NO. QUESTIONS CHOICE A CHOICE B CHOICE C CHOICE D
1 A ship steaming on a course of 246˚ T at 17
knots. At 2107 a lighthouse was observed
bearing 207 deg T and at 2119 the same
lighthouse bears 179˚ T. What is the ship's
distance off at second bearing?4.6 miles 3.9 miles 4.2 miles 5.1 miles
2 A ship is steaming a course of 090˚ T at a
speed of 14 knots. At 1841H you observed a
lighthouse bearing 053 deg.T and at 1904H,
the same lighthouse bears 031˚ T. What is
the distance to the lighthouse when
abeam?
7.4 miles 8.3 miles 6.5 miles 3.4 miles
F1 - WES (OIC) 072310
Area-A: Pre-Voyage Procedures, Principles of Celestial Navigation, Terrestrial Navigation,
Electronic Navigation, Magnetic and Gyro Compass
3 Aship is steaming a course of 090˚T at a
speed of 14 knots. At 1841, you observed a
lighthouse bearing 053°T and at 1904, the
same lighthouse bears 031˚T. What will be
the time when the lighthouse is abeam of
your vessel?
1923 1926 1919 1920
4 You are steaming on course 090˚T at 14
knots when a lighthouse was observed
bearing 053˚ T at 1841. The same
lighthouse bears 031˚T at 1904. What is
the distance off the lighthouse at second
bearing?
8.6 miles 9.8 miles 7.4 miles 4.4 miles
5 A ship is on course 253˚ T at 14 knots. At
2329 a lighthouse was observed bearing
282˚ T At 2345 the same lighthouse bears
300 deg.T Find the ship's distance off at
second bearing?
5.9 miles 3.7 miles 4.2 miles 52 miles
6 You are steering 078˚ T, and a light was
seen dead ahead at a distance of 15.6 miles
at 2316 you change course to pass the light
abeam to port at a distance of 4.5 miles. If
you are making 17 knots, what is the time
when abeam of the light?
0009H 0011H 0007H 0013H
7 You are steering 031˚ T, and a light was
seen dead ahead at a distance of 12.7 miles
at 0017H you change course to pass the
light abeam to starboard at a distance of
3.5 miles. If you are making 11 knots, what
is the time when abeam of the light?
0124H 0120H 0009H 0126H
8 You are steering 173˚T and a light was
picked up dead ahead at a distance of 13.9
miles at 0054. You change course to pass
the light 4.5 miles off abeam to port. If you
making 21 knots, what will be the time
when abeam of the light?
0131H 0129H 0133 H 0135H
9 You are steering 163˚ T and a light was
picked up dead ahead at a distance of 11
miles at 0142. You change course to pass
the light 2 miles off abeam to starboard. If
you making 13 knots, what will be the time
when abeam of the light?
0232H 0230H 0234H 0132H
10 A vessel was steaming on a course 168˚ T at
a speed of 18 knots. At 1426H a buoy was
sighted bearing 144˚ T . At 1434 another
bearing of the buoy was taken at 116˚ T.
What is the distance off the second bearing
and the predicted distance when abeam?
2.0 miles,2nd
bearing;
1.8 miles
abeam
2.7 miles 2nd
bearing;
1.8 miles
abeam
2.3 miles, 2nd
bearing; 2
miles,abeam
2.0 miles, 2nd
bearing;
1 mile, abeam
11 You desire to make good a true course of
067˚T.The variation is 11˚ West, the
magnetic compass deviation is 3˚ East and
the gyro error is 1˚ West. A northwesterly
wind produces a 5 degree leeway. What
should be the course to steer per standard
compass to make good the true course?
070 psc 054 psc 064 psc 074 psc
12 You desire to make good a true course of
129˚T. The variation is 7˚ East, magnetic
compass deviation is 4˚ East and the gyro
error is 2˚ West. An easterly wind produces
a 4 degree leeway. What should be the
course to steer per magnetic compass in
order to make good the true course?
114 psc 116 psc 076 psc 126 psc
13 The True course between two points is
023˚T The gyro error is 1˚West and you
make an allowance of 4 degree leeway for
an East wind. What gyro course should be
steered in order to make the True course
good?
026 pgc 020 pgc 021 pgc 028 pgc
14 The True course between two points is
041˚T. The gyro has an error of 1˚ West.
You make an allowance of 2 degree leeway
for an east-southeast wind. What gyro
course should be steered to make the True
course good?
044 pgc 026 pgc 043 pgc 040 pgc
15 Your vessel is steering a course of 027˚ psc.
The variation for the locality is 19˚ West
and the deviation of the compass is 2˚ East.
The wind is from the North-northwest,
producing a 5 degree Leeway. What True
course are you making good?
015 T 005 T 026 T 044 T
16 A ship was on course 253˚ T at 14 knots. At
2329 a lighthouse was observed bearing
282˚ T At 2345, the lighthouse bears 300˚
T. What is the ship's distance off the
second bearing and distance when abeam?
5.9 mi./ 4.3
mi.
3.7 mi./ 4.3
mi.
4.2 mi./ 5.9
mi.
5.2 mi./ 5.9
mi.
17 You are steering 019˚T, and a light was
picked up dead ahead at a distance of 11.6
miles at 0216H. You change course to pass
the light 3 miles off abeam to port. If you
are making 14 knots, what is your ETA at
the position 3 miles off the light?
0304H 0332H 0340H 0232H
18 You are steering 231˚ T, and a light is picked
up dead ahead at a distance of 12.3 miles
at 0338H. You then change course to pass
the light 4 miles off abeam to starboard. If
you are making 16.5 knots, what is your
ETA at the position 4 miles off the light?
0420H 0342H 0424H 0644H
19 You are steering 287˚T and a light was
picked up dead ahead at a distance of 19.4
miles at 0419H. You change course to pass
the light 4 miles off abeam to starboard. If
you are making 13 knots, what is your ETA
at the position 4 miles off the light?
0547H 0447H 0432H 0420H
20 You are steering 115˚ T, and a light was
picked up dead ahead at a distance of 16.7
miles at 0522. You change course to pass
the light 3.5 miles off abeam to port. If you
are making 12 knots, what is your ETA at
the position 3.5 miles off the light?
0644H 0547H 0531H 0544H
21 Your ship is sailing at 20 knots on course
160˚T. At 1840 hours you observe a
lighthouse bearing 205˚ T. At 1908 hours,
the light bears 250˚ T. What is your
distance off the lighthouse at the second
bearing?
9.3 miles 9.8 miles 10.2 miles 12. 0 miles
22 Your ship is sailing on course 250˚ T at 20
knots. At 1418 hours you observe a
lighthouse bearing 205˚T At 1446 hours,
the same lighthouse bears 160˚ T. At what
distance off will your vessel be abeam of
the light?
9.3 miles 9.0 miles 9.6 miles 8.3 miles
23 Your vessel is on course of 343˚T at 14
knots. At 2156H a light bears 320.5˚T and
at 2217H the same light bears 298˚T. At
what time and at what distance off will
your vessel be abeam of the light?
2232H, 3.4
miles
2228H, 4.3
miles
2235H, 9.3
miles
2241H, 4.6
miles
24 Your vessel is proceeding down a channel
and you see a pair of range lights that are in
line ahead. The chart indicates that the
direction of this pair of lights is 229˚T and
the variation is 6˚ West. If the heading of
your vessel at the time of the sighting is
232˚ psc, what is the correct deviation?
3 deg. East 3 deg.West 9 deg. East 9 deg. West
25 While proceeding up a channel on a course
of 350˚ pgc you took a bearing on a pair of
range lights and got a bearing of 355˚ pgc.
The true bearing on the nautical chart is
indicated as 357˚T. The variation for the
locality is 22˚ West. The ship's course psc is
015˚. The deviation on the present heading
is ______.
1 deg. West 1 deg. East 4 deg. West 5 deg. West
26 Your vessel is steering a course of 216˚ psc.
Variation for the area is 9˚ West and the
deviation is 2˚ East. The wind is from East
producing a 5˚ leeway. What true course
are you making good?
214 deg True 223 deg.True 204 deg.True 227 deg.True
27 Your vessel is steering a course of 197˚ psc,
variation for the area is 7˚ East and the
deviation is 4˚ West. The wind is from the
West producing a two-degree leeway.
What true course are you making good?198 deg True 196 deg True 192 deg True 202 deg. True
28 You desire to make good a true course of
203˚ T. The variation is 19˚ East, the
magnetic compass deviation is 2˚ West and
the gyro compass error is 1˚ East. What
should be the compass course to steer per
standard magnetic compass to make the
true course good?
189 psc 183 psc 223 psc 210 psc
29 You desire to make good a true course of
007˚ True. The variation is 5˚ East,
deviation is 3˚ West and the gyro compass
error is 2˚ East. A Southwest by west wind
produces a 2 degree leeway. What is the
course to steer per standard magnetic
compass to make the true course good?
003 deg psc 005 deg psc 007 deg psc 000 psc
30 Your vessel is proceeding up a channel and
you see a pair of range lights that are in line
ahead. The chart indicates that the
direction of this pair of lights is 212˚ T and
the variation is 7˚ West. If the heading of
your vessel at the time of of the sighting
208˚ per standard magnetic compass, what
is the correct deviation?
11 deg. East 11 deg. West 4 deg. East 4 deg. West
31 Your vessel is proceeding up a channel and
you see a pair of range lights that are in line
ahead. The chart indicates that the
direction of this pair of lights is 014˚ T and
the variation is 11˚ East. If the heading of
your vessel at the time of sighting is 009˚
per standard magnetic compass, what is
the correct deviation?
6 deg. West 6 deg. East 11 deg. East 4 deg. East
32 Your vessel is proceeding up a channel and
you see a pair of range lights that are in line
ahead. The nautical chart indicates that the
direction of this pair of lights is 343˚ T and
the variation is 5˚ West. IF the heading of
your vessel at the time of sighting is 344˚
per standard magnetic compass, what isthe
correct deviation?
4 deg. East 11 deg. East 6 deg. West 2 deg. West
33 While your vessel is proceeding down a
channel you notice a range of lights in line
with your vessel's mast. If your vessel is on
course 001˚ per gyro compass and the
charted value of the range lights is 359˚
True, find your gyro compass error.
2 deg. West 2 deg. East 1 deg. East 1 deg. West
34 The true course between two waypoints is
078˚ Your gyrocompass has an error of 2˚
East and you make anallowance of 3 degree
leeway for a North wind. You are at
present on auto pilot. What gyro course
should be set on your gyro pilot in order to
make good the true course?
073 pgc 077 pgc 079 pgc 075 pgc
35 The true course between two waypoints is
312˚T. Your gyrocompass has an error of 3˚
West and you make an allowance of 4
degree leeway for a west by south wind. At
present you are on auto-pilot. What gyro
course should be set on your gyro pilot to
make the true course good?
311 pgc 315 pgc 318 pgc 305 pgc
36 A true course of 041˚ between two
waypoints is plotted on the nautical chart.
At that moment the wind is blowing from
East-southeast which would require you to
make an allowance of 2˚ to compensate the
effect of the wind. Your gyro compass has
an error of 1˚W. What gyro course should
be steered to make the true course good?
044 pgc 040 pgc 042 pgc 043 pgc
37 The course line plotted on the chart
indicates that the true course between the
2 waypoints is 119 deg.T. Your gyro
compass has an error of 3 deg. East and you
have to make an allowance of 4 deg.
leeway for a south-southwest wind. What
gyro course should be steered to make the
true course good?
120 pgc 112 pgc 113 pgc 126 pgc
38 While proceeding up a channel on a course
of 010˚ per gyro compass you notice a pair
of range lights in alignment with the masts
of your vessel when viewed forward. A
check on the chart shows the range to be
009˚ T and the variation on the compass
rose to be 15˚W. If the ship's course is 026˚
psc, what is the deviation on the present
heading?
2 deg. West 2 deg. East 1 deg. West 1 deg. East
39 Your ship is entering a channel on a
magnetic course of 265˚ with two beacons
in range. The true range bearing as taken
from the chart is 264˚. If the variation in the
locality is 1˚ East, what is the deviation of
the magnetic compass?
2 deg. West 2 deg. East 1 deg. East 1 deg. West
40 What is the true bearing of the peak to be
plotted as a line of position (LOP) on the
chart when the compass bearing of the
peak is 336˚ with a variation of 1˚ East and
the deviation is 5˚ West?
332 deg.T 331 deg. T 337 deg. T 338 deg. T
41 The compass bearing of a mountain peak
was taken as 336˚. The variation is 15˚ West
and the deviation is 9˚ West. The true
bearing of the peak as plotted on the chart
is:
312 deg T 332 deg. T 311 deg. T 000 deg.T
42 What is the deviation of the compass on
heading 053˚ T when steering 044 per
steering compass to a beacon in range dead
ahead with variation in the locality of 4 deg.
W?
13 deg.East 4 deg West 2 deg West 4 deg East
43 You have just taken a satellite fix on your
ship and from there the Master traced a
new course line on the chart which is 130˚
True. The variation for the locality is 10˚
West and the deviation is 6˚ East. Find
compass error and then solve for the
compass course to steer.
C/E = 4
deg.West
Compass Co.
= 134 psc
C/E = 16 deg.
East compass
co. = 146 psc
C/E = 6 deg.
West
Compass co.=
143 psc
C/E = 4 deg.
East
Compass co. =
126 psc
44 A ship is on course 250˚ psc, deviation is 18˚
East, variation of the locality is 7˚ East. Find
the compass error and the true course.
C/E = 25 deg.
East
True co. = 275
T
C/E = 4 deg.
East
Compass co.
=134 psc
C/E = 25 deg.
East
True co. =265
T
C/E = 4 deg.
West
True co = 275
T
45 A ship is on course 241˚ psc and 251˚ pgc,
when you noticed a range in line bearing
192˚ by gyro. The chart indicates that the
range is in line on 194˚ T. The variation of
the locality is 16˚ East. What is the
deviation of the magnetic compass?
4 deg. W 4 deg. E 2 deg. W 2 deg. E
46 Your vessel is steering a course of 216˚ psc.
Variation for the area is 9˚ West and the
deviation is 2˚ East. The wind is from East
producing a 5˚ leeway . What is the true
course made good (TCMG)?
214 deg.T 212 deg. T 216 deg. T 311 deg. T
47 Find the compass course to steer(CCTS) on
a True course of 225˚ T. Leeway due to a
Southerly wind is 10 degrees. The Variation
on the locality is 5˚ East, deviation of the
compass is 4˚ East.
206 deg. Psc 214 deg psc 120 deg psc 225 deg. Psc
48 You are enroute to assist vessel B. Vessel B
is underway at 5 knots on course 063˚ T
and bears 136˚T at 78 miles away from you.
What is the course to steer at 13 knots to
intercept vessel B?114 deg. T 256 deg.T 303 deg. T 328 deg.T
49 You are enroute to assist vessel B. Vessel B
is underway at 4.5 knots on course 233˚ T
and bears 264˚ T at 68 miles away from
you. What is the course to steer at 13
knots to intercept vessel B?256 deg.T 249 deg T 114 deg. T 262deg.T
50 You are enroute to assist vessel A. Vessel A
is underway at 5.5 knots on course 033˚ T
and bears 248˚ T at 64 miles from you.
What is the course to steer at 13 knots to
intercept vessel A?
262 deg.T 214 deg.T 256 deg.T 303 deg.T
51 You are enroute to assist vessel A. Vessel A
is underway at 5.5 knots on course 033˚ T
and bears 284˚ T at 43 miles from you.
What is the course to steer at 16 knots to
intercept vessel A?
303 deg.T 114 deg.T 262 deg.T 256 deg.T
52 You are enroute to assist vessel A. Vessel A
is underway at 4.5 knots on course 233˚ T
and bears 346˚ T at 68 miles from you.
What is the course to steer at 13 knots to
intercept vessel A?
328 deg.T 303 deg. T 256 deg.T 224 deg.T
53 The position obstained from one point
relative to another, without considering the
distance between them is called _______. Direction Fix Course Heading
54 Course is the direction of movement of the
observer while the direction of an object
from the observer is called ______. Bearing Relative Motion Range Distance
55 The direction of an object from the
observer is known as bearing while the
direction of movement of the observer is
called _____.Course Running fix Range Bearing
56 The bearing relative to the heading of a
vessel which is expressed as the angular
difference between heading and the
direction is called ______.
Relative
BearingTrue bearing Azimuth Range
57 The direction in which a vessel is steered is
called the course while the path that is
actually followed by the vessel is called the
______.
Course over
groundTrack Track line Route
58 You are course 027˚T and took a relative
bearing of a lighthouse and found to be
220˚. What is the True bearing of the
lighthouse?247 deg.T 113 deg.T 214 deg T 303 deg.T
59 You are on course 344˚ T and took a
relative bearing of a lighthouse of 270˚.
What is the True bearing of the lighthouse? 254 deg.T 247 deg.t 322 deg.T 225 deg. T
60 You are on course 277˚ T and took a
bearing of a lighthouse of 045˚ R. What is
the True bearing of the lighthouse? 322 deg.T 038 deg.T 247 deg.T 254 deg.T
61 What is the relative bearing of an object
broad on port quarter? 225 deg 195 deg 315 deg 240 deg
62 What is the relative bearing of an object
that is broad on starboard bow? 045 deg 030 deg 060 deg 075 deg
63 If you take a bearing of 176˚ to a
lighthouse, what other bearing of another
conspicuous object would give the best fix? 079 deg 151 deg 176 deg 292 deg
64 If you take a bearing of 264˚ to a
lighthouse, what other bearing of another
conspicuous object would give the best fix? 350 deg 079 deg 289 deg 120 deg
65 If you take a bearing of 356˚ to a
lighthouse, what other bearing of another
prominent object would give the best fix? 082 deg. 350 deg. 130 deg. 201 deg.
66 What is the relative bearing of an object
which is two points abaft the starboard
beam?112.5 deg. 225 deg 235 deg 315 deg
67 What is the relative bearing of an object
which is two points abaft the port beam? 247.5 deg 112.5 deg 235 deg 337.5 deg
68 What is the relative bearing of an object
located dead astern? 180 deg 270 deg. 360 deg 090 deg
69 If you take a bearing of 191˚ and 313˚ to
two prominent objects, what bearing of a
third object will provide the best fix? 069 deg 001 deg 209 deg 356 deg
70 If you take a bearing of 142˚ and 259˚ to
two prominent objects on shore, what
bearing of a third object will provide the
best fix?201 deg 238 deg 081 deg. 234 deg
71 If you take a bearing of 313˚ and 076˚ of
two prominent objects, what bearing of a
third object will provide the best fix?014 deg. 133 deg. 255 deg. 339 deg.
72 You are taking bearings on two known
objects on shore. The best fix is ontained
when the angle between the lines of
position is:90 deg 30 deg 45 deg 60 deg
73 If you take a bearing of 086˚ to a
lighthouse, what other bearing of another
prominent object would give the best fix? 000 deg 066 deg 112 deg 271 deg
74 If you take a bearing of 176˚ to a
lighthouse, what other bearing of another
prominent object would give the best fix? 079 deg 151 deg 176 deg 292 deg
75 If you take a bearing of 264˚ to a
lighthouse, what other bearing of another
prominent object would give the best fix? 350 deg 289 deg 081 deg. 120 deg
76 If you take a bearing of 356˚ to a
lighthouse, what other bearing of another
fixed object on shore would give the best
fix?
082 deg. 013 deg 176 deg 201 deg.
77 If you take a bearing of 043˚ and 169˚ to
two prominent objects ashore, what
bearing of a third object will provide the
best fix?
102 deg 356 deg. 144 deg 201 deg.
78 If you take a bearing of 135˚ to a prominent
object, which other bearing of another
object will NOT provide the best fix? 315 deg 045 deg 225 deg any of these
79 If you take a bearing of 225˚ to a prominent
object on shore, which other bearing of
another prominent object will NOT provide
the best fix?045 deg 315 deg 135 deg any of these
80 If you take a bearing of 045˚ to a prominent
object on shore, which other bearing of
another prominent object will NOT provide
the best fix?225 deg 135 deg 315 deg any of these
81 If you take a bearing of 315˚ to a
conspicuous object on land, which other
bearing of another object will NOT provide
the best fix?
135 deg 225 deg 045 deg any of these
82 If you take a bearing of 249˚ to a fixed
known object on shore, which other
bearing will NOT give a good fix?069 deg 159 deg 339 deg none of these
83 If you take a bearing of 086˚ to a
lighthouse, which other bearing of another
prominent object will NOT give a good fix? 266 deg 176 deg 356 deg. none of these
84 If you take a bearing of 176˚ to a
lighthouse, which other bearing of another
prominent object will NOT give a good fix? 356 deg 086 deg 266 deg none of these
85 If you take a bearing of 191˚ to a prominent
object ashore, which bearing of another
object will NOT provide a good fix? 011 deg 101 deg 281 deg none of these
86 If you take a bearing of 264˚ to a
lighthouse, which other bearing of another
prominent object will NOT produce a good
fix?084 deg 174 deg 354 deg any of these
87 If you take a bearing of 142˚ to a
lighthouse, which other bearing of another
lighthouse will NOT produce a good fix? 322 deg 232 deg 052 deg any of these
88 If you take abearing of 259˚ to a fixed
known object on shore, which of the
following bearings of other objects will NOT
produce a good fix?079 deg 349 deg 169 deg none of these
89 If you take a bearing of 322˚ to a fixed
charted object on shore, which of the
following bearing of another object will
NOT provide a good fix?
142 deg 232 deg 052 deg none of these
90 If you take a bearing of 145˚ to a fixed
charted object on shore, which of the
following bearing of another object will
NOT provide a good fix?
325 deg 055 deg 235 deg any of these
91 Which of the following bearings of two
prominent objects when taken
simultaneously will provide a good fix?144 deg and
236 deg
132 deg and
312 deg
259 deg and
079deg
264 deg and
084 deg
92 Which of the following bearings of two
fixed objects on shore when taken
simultaneously will provide a good fix?228 deg and
136 deg
282 deg and
102 deg
346 deg and
166 deg
276 deg and
096 deg
93 Which of the following bearings of two
lighthouses when taken simultaneously will
provide a good fix?184 deg and
275 deg
311 deg and
131 deg
196 deg and
017 deg
163 deg and
343 deg
94 Which of the following bearings of two
fixed and charted objects will provide a
good fix when taken at nearly the same
time?
119 deg and
207 deg
144 deg and
325 deg
025 deg and
029 deg
228 deg and
236 deg
95 Which of the following bearings of two
fixed and charted objects will provide a
good fix when taken at nearly the same
time?
131 deg and
040 deg
131 deg and
311 deg
214 deg and
034 deg
194 deg and
014 deg
96 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
136 deg and
228 deg
102 deg and
282 deg
166 deg and
346 deg
096 deg and
276 deg
97 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
275 deg and
184 deg
131 deg and
311 deg
017 deg and
196 deg
343 deg and
163 deg
98 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
207 deg and
119 deg
325 deg and
144 deg
029 deg and
025 deg
232 deg and
229 deg
99 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
040 deg and
131 deg
312 deg and
309 deg
211 deg and
214 deg
189 deg and
191 deg
100 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
128 deg and
218 deg
132 deg and
312 deg
128 deg and
132 deg
167 deg and
173 deg
101 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
345 deg and
280 deg
236 deg and
226 deg
247 deg and
252 deg
123 deg and
303 deg
102 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
209 deg and
285 deg
116 deg and
109 deg
254 deg and
260 deg
136 deg and
317 deg
103 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
023 deg and
102 deg
128 deg and
152 deg
144 deg and
119 deg
279 deg and
256 deg
104 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
120 deg and
042 deg
153 deg and
333 deg
321 deg and
341 deg
176 deg and
167 deg
105 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
005 deg and
056 deg
105 deg and
118 deg
134 deg and
314 deg
320 deg and
136 deg
106 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
313 deg and
076 deg
133 deg and
113 deg
076 deg and
097 deg
121 deg and
303 deg
107 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
142 deg and
259 deg
321 deg and
144 deg
249 deg and
067 deg
167 deg and
177 deg
108 Which of the following bearings of two
fixed and charted objects will give a good
crossing angle between 2 LOPs if taken at
nearly the same time?
169 deg and
048 deg
120 deg and
312 deg
313 deg and
136 deg
005 deg and
016 deg
109 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 321˚. The vessel is
"on range" when she is steering a course of
______.
321 deg.T 321 deg psc 141 deg T 000 deg.T
110 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 108˚. The vessel is
"on range" when she is steering a course of
______.
108 deg.T 180 deg.T 321 deg.T 108 deg psc
111 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 243˚. The vessel is
"on range" when she is steering a course of
______.
243 deg.T 270 deg. T 234 deg.T 063 deg T
112 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 041˚. The vessel is
"on range" when she is steering a course of
______.
041 deg.T 090 deg.T 041 deg psc 140 deg.T
113 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 287˚. The vessel is
"on range" when she is steering a course of
______.
287 deg.T 360 deg.T 287 deg psc 278 deg.T
114 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 001˚. The vessel is
"on range" when she is steering a course of
______.
001 deg.T 000 deg.T 180 deg.T 359 deg.T
115 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 154˚. The vessel is
"on range" when she is steering a course of
______.
154 deg.T 146 deg.T 154 deg psc 145 deg.T
116 A vessel is following a range to keep herself
within a narrow channel. The chart
indicates the range to be 256˚. The vessel is
"on range" when she is steering a course of
______.
256 deg.T 265 deg.T 000 deg.T 256 deg psc
117 Your vessel is making way through the
water at a speed of 12 knots. Your vessel
traveled 30 nautical miles in 2 hours 20
minutes. What current are you
experiencing?
A following
current of 0.9
knot
A following
current at 2
knots
A head
current at 2.0
knots
A head
current of 0.9
knot
118 Your vessel is making way through the
water at a speed of 12 knots. Your vessel
traveled 30 nautical miles in 2 hours 15
minutes. What current are you
experiencing?
A following
current of 1.3
knots
A following
current at 2
knots
A head
current at 2.0
knots
A head
current of 0.9
knot
119 Course is the direction of movement of the
observer while the direction of a current
from the observer is called ______. set bearing drift slack
120 Your vessel is making way through the
water at a speed of 12 knots. Your vessel
traveled 30 nautical miles in 2 hours 30
minutes. What current are you
experiencing?
slack
A following
current of 0.9
knots
A head
current of 0.9
knots
A following
current of 1.3
knots
121 Your vessel is making way through the
water at a speed of 10 knots. Your vessel
traveled 30 nautical miles in 2 hours 30
minutes. What current are you
experiencing?
A following
current of 2.0
knots
A following
current of 0.9
knots
A following
current of 0.5
knots
A head
current of 0.9
knot
122 Your vessel is making way through the
water at a speed of 14 knots. Your vessel
traveled 30 nautical miles in 2 hours 24
minutes. What current are you
experiencing?
A head
current of 1.5
knots
A following
current of 1.5
knots
A following
current of 2
knots
A head
current of 2
knots
123 Your vessel is making way through the
water at a speed of 14 knots. Your vessel
traveled 55 nautical miles in 3 hours 24
minutes. What current are you
experiencing?
A following
current of 2.2
knots
A following
current of 1.3
knots
A head
current of 2.2
knots
A head
current of 1.5
knots
124 Your vessel is making way through the
water at a speed of 14 knots. Your vessel
traveled 46 nautical miles in 3 hours 24
minutes. What current are you
experiencing?
A head
current of 0.5
knot
A head
current of 1.5
knots
A following
current of 1.5
knots
A following
current of 2.5
knots
125 Your vessel is making way through the
water at a speed of 16 knots. Your vessel
traveled 45 nautical miles in 2 hours 30
minutes. What current are you
experiencing?
A following
current of 2
knots
A head
current of 2.5
knots
A following
current of 1.5
knots
A head
current of 0.5
knot
126 Your vessel is making way through the
water at a speed of 16 knots. Your vessel
traveled 56 nautical miles in 3 hours 30
minutes. What current are you
experiencing?
current is slack
A head
current of 1.5
knots
A following
current of 2.2
knots
A head
current of 0.5
knot
127 At 0000H you fix your position and change
course to 090˚T At 0030H, you again fix
your position, and it is 0.5 miles east of
your DR position. Which statement is true?The current is
easterly
The drift is 0.5
knot
You should
alter course to
the right to
regain the
track line
The current is
perpendicular
to your
trackline
128 At 0000H you fix your position and change
course to 270˚T At 0030H, you again fix
your position, and it is 0.5 miles east of
your DR position. Which statement is true?
The set is 090,
drift 1.0 knot
The set is 090,
drift 0.5 knot
The set is 270,
drift 0.5 knot
The set is 270,
drift 1.0 knot
129 At 0000H you fix your position and plot a
new DR trackline. At 0200H, you again fix
your position, and it is 0.5 miles west of
your DR position. Which statement is true?The set is 270,
drift 0.25 knot
The set is 090,
drift 0.5 knot
The set is 270,
drift 0.5 knot
The set is 270,
drift 1.0 knot
130 At 0000H you fix your position and plot a
new DR trackline. At 0200H, you again fix
your position, and it is 0.5 miles west of
your DR position. Which statement is true? The drift is
0.25 knot
The current is
westerly at
0.25 knot
You must
increase
speed to
compensate
for the
current
The current
cannot be
determined
131 At 0000H you fix your position and change
course to 090˚ T At 0030H, you again fix
your position, and it is 0.5 miles west of
your DR position. Which statement is true?The current is
westerlyThe is 0.5 knot
You should
alter course to
the right to
regain the
trackline
The current is
perpendicular
to your
trackline
132 At 1200H you fix your position and change
course to 000˚ T At 1230H, you again fix
your position, and it is 0.5 miles east of
your DR position. Which statement is true?The current is
easterly
The current is
westerly
The current is
Northerly
The current is
southerly
133 At 1100H you fix your position and change
course to 000˚T At 1130H, you again fix
your position, and it is 0.5 miles west of
your DR position. Which statement is true?The current is
westerly
The current is
easterly
The current is
northerly
The current is
southerly
134 At 0000H you fix your position and change
course to 180˚T At 0100H, you again fix
your position, and it is 1.5 miles north of
your DR position. Which statement is true?The current is
northerly
The current is
southerly
The current is
easterly
The current is
westerly
135 At 1000H you fix your position and change
course to 180˚T At 1030H, you again fix
your position, and it is 0.5 miles south of
your DR position. Which statement is true?
The current is
southerly
The current is
northerly
The current is
easterly
The current is
westerly
136 At 0900H you fix your position and change
course to 135˚T At 0930H, you again fix
your position, and it is 0.5 miles southwest
of your DR position. Which statement is
true?
The current
set is 225 deg.
The drift is 0.5
knot
A head
current
affects the
vessel
The current is
135 deg.
137 At 0000H you fix your position and change
course to 225˚T At 0130H, you again fix
your position, and it is 0.5 miles northwest
of your DR position. Which statement is
true?
The current
set is 315 deg.
The current
set is 225 deg.
The current
set is 045 deg.
The drift is 0.5
knot
138 At 0800H you fix your position and change
course to 045˚T At 0830H, you again fix
your position, and it is 0.5 mile southeast of
your DR position. Which statement is true?The current
set is 135 deg.
The current
set is 225 deg.
The current
set is 045 deg
The drift is
0.25 knot
139 At 0105H you fix your position and change
course to 135˚T At 0135H, you again fix
your position, and it is 0.5 mile southeast of
your DR position. Which statement is true?
Dirft = 1.0
knot;
Current Set =
135 deg.T
Drift = 0.5
knot;
Current Set
=225 deg.T
Drift = 1.0
knot
Current Set =
315 deg.T
Drift = 0.5
knot
Current Set =
135 deg.T
140 At 1200H you fix your position and change
course to 315˚T At 1225H, you again fix
your position, and it is 0.9 mile southwest
of your DR position. Which statement is
true?
Drift = 2.1
knots;
Current Set =
225 deg.T
Drift = 1.0
knot
Current Set =
135 deg.T
Drift = 1.0
knot
Current Set =
315 deg.T
Drift = 2.1
knots
Current set =
045 deg.T
141 At 0300H you fix your position and change
course to 225˚ At 0315H, you again fix your
position, and it is 0.5 miles northwest of
your DR position. Which statement is true?
Drift = 2
knots;
Current Set =
315 deg.T
Drift = 1 knot;
Current Set =
135 deg.T
Drift = 2
knots;
Current Set =
135 deg.T
Drift = 1.0
knot
Current Set =
225 deg.T
142 At 0400H you fix your position and change
course to 045˚T At 0450H, you again fix
your position, and it is 1.0 mile northeast of
your DR position. Which statement is true?
Drift = 1.2
knots;
Current Set
=045 deg. T
Drift = 2.1
knots;
Current Set =
135 deg.T
Drift = 1.2
knots;
Current Set =
315 deg.T
Drift = 2.1
knots
Current set =
045 deg.T
143 A vessel is to proceed at 12 knots on a
course of 211˚T through a current
estimated to be setting at 255˚T and a drift
of 3 knots. Find Course To Steer (CTS) and
the speed of advance (SOA).
CTS = 199
deg.T;
SOA = 10
knots
CTS = 205
deg.T
SOA = 13
knots
CTS = 203
deg.T;
SOA = 11
knots
CTS = 203
deg.T;
SOA = 11
knots
144 You desire to make good a course of 062˚T
to a destination 4.7 miles away. Your
speed is 3 knots. The Tidal Current Table
lists a set of 120˚T and a drift of 1 knot for
the time period you will be making the
passage. Find your course to steer (CTS) an
CTS = 046
deg.T;
SOA = 3.3 3.3
knots
CTS = 048
deg.T;
SOA = 4.0
knots
CTS =040
deg.T;
SOA = 2.5
knots
CTS = 047
deg.T
SOA = 4.5
knots
145 The anchorage is located 20 nautical miles
North of a vessel with a speed of 15 knots.
A current is known to set 3 knots Easterly.
Calculate the course to steer in order to
drop her anchor to the charted anchorage
on the spot.
349 deg. 359 deg. 340 deg. 009 deg.
146 You are underway on course 180˚T at 22
knots. The apparent wind is from 70 deg.
off the port bow, speed 20 knots. What is
the true direction and speed of the true
wind?
051 deg.T;
24.1 knots
058 deg.T; 22
knots
027 deg.T; 21
knots
048 deg.T; 36
knots
147 You are underway on course 270˚T at 10
knots. The apparent wind is from 10 deg.
off the port bow, speed 30 knots. What is
the true direction and speed of the true
wind?
225 deg.T; 20
knots
051 deg.T; 24
knots
270 deg.T; 11
knots
357 deg.T; 13
knots
148 Your ship is on course 195˚T at 15 knots.
The apparent wind is from 40 deg. on the
port bow, speed 30 knots. The direction
and speed of the true wind are:
027 deg.T; 21
knots
153 deg.T; 25
knots
051 deg.T; 24
knots
225 deg.T; 20
knots
149 Your ship is proceeding on course 150˚T at
a speed of 17 knots. The apparent wind is
from 40 deg on your starboard bow, speed
15 knots. Calculate the True wind direction
and speed.
270 deg.T; 11
knots
225 deg. T;
11 knots
153 deg.T; 24
knots
051 deg. T; 24
knots
150 Your vessel's course is 150˚T at 17 knots.
The apparent wind is from 40 deg. off the
starboard bow, speed 15 knots. What is
the speed of the true wind?11 knots 13 knots 8 knots 15 knots
151 When a body has crossed the observer's
meridian, this is called: any of thesemeridian
passageculmination
meridian
transit
152 During meridian passage, the LHA and
meridian angle of the body is zero. What is
its altitude?maximum
altitude
minimum
altitudeabout 90 deg.
equal to your
latitude
153 To a certain observer, a meridian transit
can be at: I. upper transit only II. Lower
transit only both I and II neither I nor II I only II only
154 A body will be observed at lower transit
only :if the body is
circumpolar
during
datlight hours
during
summer time
none of the
above
155 At lower transit, the body's altitude is at its
minimum bearing North or South. What
will be the LHA?180 deg. 090 deg.T 270 deg. 060 deg.T
156 The azimuth of the celestial body during
meridian passage will be: I. North
II.Southeither I or II neither I nor II I only II only
157 If the observer is at 5˚ South and the sun's
declination is 10˚ North, what will be the
bearing of the body during meridian
passage?
..............Sun 10° N ^ The Sun is North
................ ^ of the Observer,
...............Obs 5° S ^ therefore, the
...................................... bearing of the
................................... ...body is NORTH.
NOTE: In answering this kind of question, you have to plot the Position of the "OBSERVER" and the Position of the "SUN". ............If the "SUN" is North or above the
"OBSERVER", the bearing is NORTH or 000°T.
...........If the "SUN" is South or below the
"OBSERVER", the bearing is SOUTH or 180°T.
North South 15 deg. South 5 deg. North
158 If the observer is at 5˚ South and the sun's
declination is 10˚ North, what will be the
bearing of the body during meridian
passage?000 deg.t 180 deg.t 15 deg. South 10 deg. North
159 If the observer is at 5˚ North and the sun's
declination is 10˚ South, what will be the
bearing of the body during meridian
passage?South North 15 deg. North 20 deg. South
160 If the observer is at 5˚ North and the sun's
declination is 10˚ South, what will be the
bearing of the body during meridian
passage?180 deg.T 000 deg.T 10 deg. South 5 deg. South
161 If the observer is at 5˚ North and the sun's
declination is 10˚ North, what will be the
bearing of the body during meridian
passage?
North South 15 deg. North 5 deg. south
162 If the observer is at 10˚ North and the sun's
declination is 5˚ North, what will be the
bearing of the body during meridian
passage?
South North 15 deg. North 15 deg. South
163 If the observer is at 10˚ North and the sun's
declination is 5˚ South, what will be the
bearing of the body during meridian
passage?
180 deg.T 000 deg.T 5 deg. North 5 deg. South
164 If the observer is at 5˚ North and the sun's
declination is 10˚ North, what will be the
bearing of the body during meridian
passage?
000 deg.T 180 deg.T 5 deg. South 15 deg. North
165 If the observer is at 10˚ North and the sun's
declination is 15˚ North, what will be the
bearing of the body during meridian
passage?North South 5 deg.South 25 deg. North
166 If the observer is at 10˚ North, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?North South 23 deg. 27' S 23 deg. 27' N
167 If the observer is at 40˚North, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?South North
23 deg. 27'
North
23 deg. 27'
South
168 If the observer is at 10˚ North, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?000 deg.T 180 deg.T 23 deg. 27' N 23 deg. 27' S
169 If the observer is at 40˚ North, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?180 deg.T 000 deg.T 23 deg. 27'S 23 deg 27'N
170 If the observer is at 10˚ South, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?North South
23 deg. 27'
North
23 deg. 27'
South
171 If the observer is at 10˚ South, and the sun
is at summer solstice, what will be the
bearing of the body during meridian
passage?
000 deg.T 180 deg.T 23 deg. 27' N 23 deg. 27' S
172 If the observer is at 10˚ South, and the sun
is at winter solstice, what will be the
bearing of the body during meridian
passage?South North
23 deg. 27'
South
23 deg. 27'
North
173 If the observer is at 10˚ South, and the sun
is at winter solstice, what will be the
bearing of the body during meridian
passage?180 deg.T 000 deg.T 23 deg. 27' N 23 deg. 27' S
174 If the observer is at 40˚ South, and the sun
is at winter solstice, what will be the
bearing of the body during meridian
passage?
North South23 deg. 27'
North
23 deg. 27'
South
175 If the observer is at 40˚ South, and the sun
is at winter solstice, what will be the
bearing of the body during meridian
passage?000 deg.T 180 deg.T
23 deg. 27'
South
23 deg.27'
North
176 Find the latitude of the observer if the sun's
altitude at upper transit is 75˚ bearing
North and the declination is 10 deg North. 5 deg. S 25 deg. S 5 deg. North 25 deg S
177 Find the latitude of the observer if the sun's
altitude at upper transit is 50˚ bearing
South and the declination is 5˚ South. 35 deg. N 45 deg. N 45 deg. S 35 deg. S
178 Find the latitude of the observer if the sun's
altitude at upper transit is 50˚ bearing
South and the declination is 10˚ South. 30 deg. N 35 deg. N 30 deg. S 35 deg. S
179 Find the latitude of the observer if the sun's
altitude at lower transit is 10˚ bearing
South and the declination is 70˚ South. 30 deg. S 30 deg. N 35 deg. N 35 deg. S
180 At meridian passage, upper transit, Ho of
the sun is 39˚19.3', bearing North.
Declination of the sun is 23˚38.2' South.
Find latitude at transit(U.T.) ........
.. Ho = 39° 19.3' N…………………….. ... .
. (-) 90° ( always - 90 )
MZD = 50° 40.7' S same sign + …
Dec = 23° 38.2' S (+) diff sign -
Lat = 74° 18.9' S .................. ......................................................................... .NOTE: If the sign of Ho is "North", then the
sign of MZD will be "South" . If Ho is "South",
MZD will be "North".(Always reverse the sign)
74˚18.9' S 27˚02.5' S 27˚02.5'N 74˚18.9'N
181 At meridian passage, upper transit, Ho of
the sun is 48˚11.6', bearing South.
Declination of the sun is 1˚46.3' North.
Find latitude at transit.43˚34.7' N 40˚02.1'N 43˚34.7 S 40˚02.1 S
182 At meridian passage, upper transit, Ho of
the sun is 76˚46.5', bearing North.
Declination of the sun is 20˚10.5' North.
Find latitude at transit.9˚57.0' N 9˚57.0' S 43˚34.7' N 74˚18.9' S
183 The Observed altitude (Ho) of Star Kochab
at meridian passage, lower transit is
16˚11.5'. The star's declination is 74˚16.2'
North. Find latitude by meridian passage
lower transit(L.T.).
…………………………………………………… Dec = 74° 16.2' N
.. ( - ) 90° ....................... ....
.PX = 15° 43.8' ........... . . ... Ho = 16° 11.5' ( always + ) .... .... .. Lat = 31° 55.3' N (same name as Dec)
NOTE: This is applicable only if the celestial
body is a circumpolar body.
31˚55.3' N 58˚04.7' N 31˚22.3' S 00˚27.7' N
184 The Observed altitude (Ho) of Star Deneb at
meridian passage, lower transit is 15˚23.5'.
The star's declination is 45˚16.6' North.
Find latitude.60˚06.9' N 43˚34.7' N 9˚57.0' N 74˚18.9' S
185 On April 22, in longitude 098˚East, the
observed altitude (Ho) of the Sun's U.L. at
meridian passage was 54˚42.2' bearing
North, declination is 11˚42.1' N. Calculate
the observer's latitude.
23˚35.7' S 43˚34.7' N 46˚59.9' N 22˚35.7' N
186 On Jan. 16, in longitude 132˚54'W, the
observed altitude (Ho) of the Sun's L.L. at
meridian passage was 64˚04.2' bearing
North, declination is 21˚58.5'S. Calculate
the observer's latitude.
47˚54.3' S 03˚57.3' S 46˚59.9' N 58˚04.7' N
187 The observed meridian altitude (Ho) fo the
star Sirius (lower transit) was 14˚03.9'
bearing South. Find the observer's latitude
if the declination is 16˚43' S87˚20.9' S 74˚18.9' S 58˚04.7' S 59˚13.1' S
188 At meridian passage, upper transit, the
observer's latitude was found to be
43˚34.7' North, Declination is 1˚46.3' North.
Find the Observed Altitude (Ho)48˚11.6' S 48˚11.6' N 41˚48.4' S 41˚48.4 N
189 At meridian passage, upper transit, the
observer's latitude was found to be 9˚57'
North, Declination is 20˚10.5' North. Find
the Observed Altitude (Ho)79˚4.5' N 79˚4.5' N 47˚54.3' S 74˚18.9' N
190 The Meridian Altitudes of a celestial body
are 12˚ and 68˚, North and South
respectively from the navigator. Calculate
the latitude.62˚ N 40˚ N 46˚43' N 46˚S
191 The Meridian Altitudes of a celestial body
are 12˚ and 68˚, North and South
respectively from the navigator. Calculate
declination of the celestial body.40˚ N 62˚ N 46˚43' N 46˚S
192 The Meridian Altitudes of a celestial body
are 12˚ and 68˚, North and South
respectively from the navigator. Calculate
the true altitude of the celestial body when
it crosses the prime vertical.46˚43' N 62˚ N 40˚ N 40˚ S
193 What is the latitude of a place where the
sun is exactly at the zenith of the observer
at Local Apparent Noon (LAN) of June 21? 23˚27' N 23˚27' S 0 deg. 90 deg.
194 What is the latitude of a place where the
sun is exactly at the zenith of the observer
at Local Apparent Noon (LAN) of December
22?23˚27' S 23˚27' N at the equator
Tropic of
Cancer
195 What is the latitude of a place where the
sun is exactly at the zenith of the observer
at Local Apparent Noon (LAN) of March 21? at the
equatorNorth Pole 23˚27' S 23˚27' N
196 What is the latitude of a place where the
sun is exactly at the zenith of the observer
at Local Apparent Noon (LAN) of September
22 or 23?
0 deg.
LatitudeSouth Pole 23˚27' S 23˚27' N
197 On June 10 in Longitude 058˚42'E, the
sextant meridian altitude (Hs) of the sun's
U.L. was 87˚32.0' bearing South, I.E. 1.3' on
the arc. DIP correction is 4.8', Main corr. Is
15.9'. Calculate the latitude of the observer
if the sun's declination from the almanac
indicates 23˚17.4' North.
26˚07.4' N 42˚10' S 47˚50' N 47˚50' S
198 The observed meridian altitude (Ho) fo the
star Sirius (lower transit) was 14˚03.9'
bearing South. Find the observer's latitude
if the declination is 16˚43' South. 87˚20.9' S 26˚07.4' N 23˚27' N 23˚27' S
199 On Jan. 20, at GMT 22h 53m 40s, in
longitude 041˚26'W, the observed altitude
(Ho) of the star Polaris was 35˚54.9' . The
correction values determined by Polaris
tables are Ao = 0˚ 53.2', A1 = 0.4' A2 =
0.7'. Calculate the observer's latitude.
35˚49.2' N 35˚49.2' S 35˚54.9' N 35˚54.9' N
200 On Sept. 12, at GMT 10h35m 00s LZT in
longitude 057˚ 58' W, the Ho of star Polaris
was 35˚50'. The correction values from the
Polaris Tables: Ao = 1˚22.1', A1 = 0.4', A2
=0.9' Find the latitude of the observer.36˚13.4' N 35˚13.4' N 37˚13.4' N 36˚13.4' S
201 Find the latitude of the observer if the true
altitude of Polaris is 34˚17.6'. The
correction values from the Polaris Tables:
Ao = 0˚58.5', A1 = 0.6', A2 = 0.9' 34˚17.6' N 36˚13.4' N 35˚13.4' N 35˚49.2' N
202 The mean radius of the Earth is 3440
nautical miles, find the radius of the
parallel of Latitude of Manila (Lat. 14˚30' N
approximately)3330.4 nm 3338.6 nm 3330.9 nm 3430.2 nm
203 The Earth is not a true sphere so that the
equatorial radius is larger than the polar
radius. The difference is _____. 13.5 miles 13,000 miles 130 miles 1300 miles
204 Given equatorial radius of the Earth as 3444
nm, find radius of a parallel of latitude at
70˚N or S 1177.9 nm 1181.4 nm 1176.1 nm 1182.3 nm
205 With an equatorial radius of the Earth of
3444nm find circumference of a parallel of
latitude 30˚N18740.2 nm 18730.2 nm 21,673.4 nm 21,630.3 nm
206 At what rate per hour is the Royal
observatory at Greenwich (Latitude
51˚28.5' N) being carried around the Earth's
axis?560.6 knots 450.8 knots 562.4 knots 520.3 knots
207 At what rate per hour is the Latitude 23˚20'
N being carried around the Earth's axis?826.4 knots 560.6 knots 234.0 knots 320.8 knots
208 At what rate per hour is latitude 60˚00' S
being carried around the Earth's axis? 450 nm/hr 826.4 nm/hr 590.6 nm/hr 540 nm/hr
209 At what rate per hour is latitude 45 deg.
North being carried around the Earth's
axis? 636.4 nm/hr 450 nm/hr 560.6 nm/hr 600 nm/hr
210 At what rate per hour is latitude 36˚38'
South being carried around the Earth's
axis?722.22 nm/hr 721.11 nm/hr 720.8 nm/hr 678.8 nm/hr
211 With a given mean radius of the Earth as
3440 nm, calculate the radius of a parallel
of latitude at 46˚24' North. 2372.3 nm 2375.5 nm 3272.3 nm 2368.9 nm
212 Assuming the equatorial radius of the Earth
as 3444 nm, find te circumference of the
equator?21639.3 nm 21640.9 nm 21630.3 nm 21,600 nm
213 The distance between two meridians is 427
nautical miles in Latitude 50˚20' N. What is
the angle at the pole?11˚08.9' 11˚56.9' 11˚38.9' 10˚45'
214 The distance between two meridians is 600
nautical miles in Latitude 45˚20' N. What is
the angle at the pole? 22˚16.9' 9˚12.6' 2˚44.5' 12˚54.6'
215 The distance between two meridians is 248
nautical miles in Latitude 63˚20' N. What is
the angle at the pole? 9˚12.6' 22˚16.9' 11˚08.9' 12˚54.6'
216 The distance between two meridians is 127
nautical miles in Latitude 39˚30' N. What is
the angle at the pole? 2˚44.5' 11˚08.9' 12˚54.6' 9˚12.6'
217 The distance between two meridians is 724
nautical miles in Latitude 20˚50' N. What is
the angle at the pole? 12˚54.6' 9˚12.6' 11˚08.9' 22˚16.9'
218 The distance between two meridians is 600
nautical miles in Latitude 45˚20' N. Find the
Difference of Longitude (Dlo) between the
2 meridians.22˚16.9' 22˚16.9' 9˚12.6' 12˚54.6'
219 In what latitude will a departure of 300 nm
corresponds to a Dlo of 6˚40'? 41˚24.6' N or
S
39˚34.6' N or
S
51˚14.6' N or
S
23˚24.6' N or
S
220 In what latitude will a departure of 250 nm
corresponds to a Dlo of 6˚40'? 51˚19.1' Nor S41˚24.6' N or
S12˚54.6'
38˚37.5' N or
S
221 In what latitude will a departure of 200 nm
corresponds to a Dlo of 4˚16' ? 38˚37.5' N or
S51˚19.1' Nor S
41˚24.6' N or
S12˚54.6'
222 On a certain parallel, the distance between
two meridians is 250 nm while the Dlo
between the meridians is 12˚30'. What is
the latitude?
70˚31.9' N or
S
41˚24.6' N or
S51˚19.1' Nor S
38˚37.5' N or
S
223 On a certain parallel, the distance between
two meridians is 340 nm while the Dlo
between the meridians is 18˚30'. What is
the latitude?
72˚09.8' N or
S
70˚31.9' N or
S51˚19.1' Nor S
41˚24.6' N or
S
224 In Latitude 50˚10' N, the departure
between two meridians is 360 nautical
miles. What is the Difference of Longitude? 9˚22' 10˚11.7' 11˚15.6' 2˚19'
225 In Latitude 45˚20' N, the departure
between two meridians is 430 nautical
miles. What is the Difference of Longitude? 10˚11.7' 20˚22.8' 22˚16.9' 12˚54.6'
226 In Latitude 20˚40' N, the departure
between two meridians is 130 nautical
miles. What is the Difference of Longitude? 2˚19' 22˚16.9' 10˚11.7' 3˚15'
227 In Latitude 38˚20' N, the departure
between two meridians is 530 nautical
miles. What is the Difference of Longitude? 11˚15.6' 12˚54.6' 20˚22.8' 2˚19'
228 A ship steams on a course of 090˚T from
port A in latitude 23˚30' N; Long. 059˚10'E
to Port B in Latitude 23˚30' N; Longitude
065˚30'E. How far did she steam? 348.5 nm 358.5 nm 368.3 nm 329.5 nm
229 A ship steams on a course of 270˚T from
port A in latitude 23˚30' N; Long. 059˚10'E
to Port B in Latitude 23˚30' N; Longitude
065˚30'E. How far did she steam?348.5 nm 358.5 nm 368.3 nm 329.5 nm
230 In Latitude 50˚20'N, a vesse steams from
Long. 015˚46'W to Long. 031˚18'W. What
distance was made good?594.9 nm 348.5 nm 358.5 nm 329.4 nm
231 On a certain parallel, the distance
betweeen two meridians is 150 nm. On the
equator the distance between the same
two meridians is 235 nautical miles. What
is the latitude of the parallel?
50˚20.1' N or
S
50˚08.1' N or
S
41˚24.6' N or
S
70˚31.9' N or
S
232 On a certain parallel, the distance
betweeen two meridians is 400 nm. On the
equator the distance between the same
two meridians is 470 nautical miles. What
is the latitude of the parallel?
31˚40.3. N or
S
50˚20.1' N or
S
40˚44.9' N or
S
41˚24.6' N or
S
233 On a certain parallel, the distance
betweeen two meridians is 250 nm. On the
equator the distance between the same
two meridians is 330 nautical miles. What
is the latitude of the parallel?
40˚44.9' N or
S
44˚40.9' N or
S
31˚40.3. N or
S
50˚08.1' N or
S
234 On a certain parallel, the distance
betweeen two meridians is 25 nm. On the
equator the distance between the same
two meridians is 30 nautical miles. What is
the latitude of the parallel?
33˚33' N or S 30˚25' N or S40˚44.9' N or
S
31˚40.3. N or
S
235 On a certain parallel, the distance
betweeen two meridians is 50 nm. On the
equator the distance between the same
two meridians is 150 nautical miles. What
is the latitude of the parallel?
70˚31.7' N or
S
72˚09.8' N or
S
71˚31.9' N or
S
50˚20.1' N or
S
236 On a certain parallel, the distance
betweeen two meridians is 130 nm. On the
equator the distance between the same
two meridians is 330 nautical miles. What
is the latitude of the parallel?66˚48' N or S 66˚28' N or S
66˚36.8' N or
S
66˚58 .9' N or
S
237 On a certain parallel, the distance
betweeen two meridians is 15 nm. On the
equator the distance between the same
two meridians is 30 nautical miles. What is
the latitude of the parallel?
60˚00' N or S 66˚48' N or S 30˚00' N or S40˚44.9' N or
S
238 On a certain parallel, the distance
betweeen two meridians is 40.8 nm. On
the equator the distance between the same
two meridians is 81.6 nautical miles. What
is the latitude of the parallel?60˚00' N or S 33˚33' N or S 30˚00' N or S 66˚48' N or S
239 On a certain parallel, the distance
betweeen two meridians is 20 nm. On the
equator the distance between the same
two meridians is 80 nautical miles. What is
the latitude of the parallel?
75˚31.3' N or
S
70˚31.7' N or
S
71˚31.9' N or
S
72˚09.8' N or
S
240 On a certain parallel, the distance
betweeen two meridians is 120 nm. On the
equator the distance between the same
two meridians is 280 nautical miles. What
is the latitude of the parallel?64˚37.4' 66˚48' N or S
66˚36.8' N or
S
64˚58 .9' N or
S
241 On a certain parallel, the distance
betweeen two meridians is 2350 nm. On
the equator the distance between the same
two meridians is 4860 nautical miles. What
is the latitude of the parallel?61˚05' N or S 60˚00' N or S 66˚48' N or S 64˚37.4'
242 On a certain parallel, the distance
betweeen two meridians is 2123 nm. On
the equator the distance between the same
two meridians is 8130 nautical miles. What
is the latitude of the parallel?
74˚51.8' N or
S
75˚31.3' N or
S
71˚31.9' N or
S
72˚09.8' N or
S
243 On a certain parallel, the distance
betweeen two meridians is 235 nm. On the
equator the distance between the same
two meridians is 350 nautical miles. What
is the latitude of the parallel?
47˚49.3' N or
s
47˚48.6' N or
S
47˚59.9' N or
S
47˚36.9' N or
S
244 On a certain parallel, the distance
betweeen two meridians is 320 nm. On the
equator the distance between the same
two meridians is 680 nautical miles. What
is the latitude of the parallel?
61˚55.6' N or
S61˚05' N or S 64˚37.4'
61˚45.6' N or
S
245 On a certain parallel, the distance
betweeen two meridians is 240 nm. On the
equator the distance between the same
two meridians is 670 nautical miles. What
is the latitude of the parallel?69˚00' N or S 60˚00' N or S 61˚05' N or S 71˚00' N or S
246 A vessel steers a course of 146˚T from Lat.
35˚10'N to Lat. 8˚46' N. How far did she
steam?1910.7 nm 1930.7 nm 1907.1 nm 1850.4 nm
247 A vessel sails from Lat.21˚45'N;
Long.023˚56' W on course 146˚ T for a
distance of 300 nm. Find the Latitude and
Longitude of Arrival by mercator Sailing.
Lat.17˚36.3' N;
Long.
026˚53.1'W
Lat. 17˚30.3'
N;
Long.
025˚53.1'W
Lat. 18˚36.3'
N;
Long.
028˚53.1'W
Lat. 26˚53.1'
N;
Long.
017˚36.1'W
248 Find the DLAT and Depature made good if a
vessel steams for 1936 nautical miles on
course 248˚ TDlat 725.2' S;
Dep. 1795.1'
Dlat 725.2' S;
Dep. 1688.1'
Dlat 725.2' N;
Dep 1795.1'
Dlat 725.1' N;
Dep. 1695.1'
249 Find the DLAT and Depature made good if a
vessel steams for 435 nautical miles on
course 026˚ TDlat 391.0' N;
Dep. 190.7'
Dlat 725.2' S;
Dep. 1688.1'
Dlat 391.0' N;
Dep. 180.7'
Dlat 279.3' S;
Dep 195.6'
250 Find the DLAT and Depature made good if a
vessel steams for 341 nautical miles on
course 215˚ TDlat 279.3' S;
Dep 195.6'
Dlat 297.3' S;
Dep 195.6'
Dlat 279.3' N;
Dep 195.6'
Dlat 289.3' S;
Dep 159.6'
251 A vessel makes a Dlat of 289.4' N and a
departure of 203.2 nautical miles. Find the
course and distance.
Course
324˚55.5';
Dist. 353.6'
Course
324˚55.5';
Dist.300.0'
Course
324˚55.5';
Dist.380.1'
Course
314˚55.5';
Dist.323.6'
252 In latitude 50˚20' N, a vessel steams 270˚T
from Long. 015˚ 46' W to Long. 031˚18' W.
Find the distance made good. 594.9 nm 554.5 nm 600 nm 348.5 nm
253 A vessel steams 470 nautical miles along
the parallel of "x" North from Long.015˚35'
W to Long. 027˚20' W. What is the latitude
of "x" ?
Lat. 48˚ 11.3'
North
Lat. 49˚ 11.3'
North
Lat. 88˚ 11.3'
North
Lat. 58˚ 11.3'
North
254 From Latitude 39˚00'N; 033˚10'W, a ship
steams on course 270˚T at 10 knots for 3
days and 8 hours. Find arrival position.Lat. 39˚00' N;
Long. 050˚
19.4' W
Lat. 38˚00' N;
Long. 050˚
19.4' W
Lat. 40˚00' N;
Long. 048˚
19.4' W
Lat. 42˚00' N;
Long. 050˚
19.4' W
255 Two ports A and B are in the Northern
Hemisphere. On the parallel of Port A, the
distance between their meridians is 250
nm. On the parallel of Port B it is 350 nm
and on the equator it is 400 nm. What are
the Latitudes of the ports?
Lat 51˚19.1' N
for Port A Lat
28˚57.3' N for
Port B
Lat 50˚19.1' N
for Port A Lat
26˚57.3' N for
Port B
Lat 53˚20.1' N
for Port A Lat
28˚55.3' N for
Port B
Lat 50˚19.1' N
for Port A Lat
28˚57.3' N for
Port B
256 A ship steams 090˚T for 200 nautical miles
in Lat. 49˚10' N. By how much will her
clocks have to be advanced? 20m 23s 19m 06s 21m 44s 24m00s
257 Your vessel receivesa distress call from a
vessel reporting her position as LAT 35˚01'
S; LONG. 018˚51' W. Your position is LAT
35˚01' S; LONG.021˚42' W. Determine what
will be your True Course and distance to
the vessel in distress by parallel sailing
method.
090˚T, 140 nm 090˚T, 188 nm 270˚T, 140 nm 270˚T, 188 nm
258 A vessel in Latitude 55˚12' N sails on course
270˚T and made a Dlo of 21˚36.6'. If the
time taken was 3 days 2 hours, find the
vessel's speed.10 knots 11 knots 12 knots 9 knots
259 On a certain parallel, a vessel must steam
one nautical mile to alter her longitude by 2
minutes. What is the latitude of the
parallel?Lat. 60˚ N or S Lat. 66˚ N or S Lat. 56˚ N or S Lat. 45˚ N or S
260 A ship "A" is on the equator steering 090˚T
at 16 knots; while a ship "B" is on a parallel
of North latitude, steering 270˚T at 12
knots. When "A" makes a Dlo of 1', "B"
makes a Dlo of 48'. Calculate the latitude
of "B".
Lat 20˚ 22' Lat 21˚ 22' Lat 23 22' Lat 22˚ 22'
261 A ship in Latitude 59˚40' sailed on a certain
course until the D.M.P. was twice the DLat.
Calculate the Latitude reached. Lat. 60˚ 20' N
or S
Lat. 65˚ 20' N
or S
Lat. 69˚ 00' N
or S Lat 20˚ 22'
262 By sailing due East for a distance of 245
nautical miles, a ship alters her longitude
by 7˚25'. Find Latitude of the ship.Lat. 56˚ 36' N
or S
Lat. 60˚ 20' N
or S
Lat 20˚ 22' N
or S
Lat. 65˚ 20' N
or S
263 Find the distance between initial position at
Lat1. 50˚0' N; 178˚0' W and Lat2. 50˚00' N;
Long. 179˚ 00'E. 116 nm 190 nm 216 nm 230 nm
264 Your ship departs Yokohama, Japan from
position Lat. 35˚27' N; Long. 139˚39' E
bound for San Francisco, California,USA. At
position Lat. 37˚48.5' N, Long. 122˚24' W.
Determine the course and distance by
Mercator sailing only.
088.3˚T; dist.
4738.4 miles
112˚T; dist.
4538.5 miles
095.3˚T; dist
4736 miles
278.3˚T;dist.
3478.4 miles
265 Your ship departs Yokohama, Japan from
position Lat. 35˚27' N; Long. 139˚39' E
bound for San Francisco, California,USA. At
position Lat. 37˚48.5' N, Long. 122˚24' W.
Determine the distance by Great Circle
sailing.
4473 miles 4458 miles 4738 miles 4567 miles
266 Your ship departs Yokohama, Japan from
position Lat. 35˚27' N; Long. 139˚39' E
bound for San Francisco, California,USA. At
position Lat. 37˚48.5' N, Long. 122˚24' W.
Determine the initial course by Great Circle
sailing.
054.3˚T 088.3˚T 095˚T 112.5˚T
267 Your ship departs Yokohama, Japan from
position Lat. 35˚27' N; Long. 139˚39' E
bound for San Francisco, California,USA. At
position Lat. 37˚48.5' N, Long. 122˚24' W.
Determine the Latitude of the Vertex (Lv)
by Great Circle sailing.
Lv = 48˚35.9'
N
Lv = 46˚35.9'
N
Lv = 58˚36.9'
N
Lv = 25˚46.9'
N
268 Your ship departs Yokohama, Japan from
position Lat. 35˚27' N; Long. 139˚39' E
bound for San Francisco, California,USA. At
position Lat. 37˚48.5' N, Long. 122˚24' W.
Determine the Longitude of the Vertex (Lv)
by Great Circle sailing.
Longv =
169˚14' W
Longv =
169˚14' E
Longv =
159˚24' W
Longv =
159˚14' E
269 Determine the great circle distance and
intial course from Lat. 27˚51' N; Long.
071˚41' W to Lat. 49˚ 45' N; Long. 006˚14'
W ?
3214 nm,
046.9˚T
3557 nm;
112˚T
3593 nm;
148.1˚T
3196 nm;
313˚T
270 Determine the great circle distance and
intial course from Lat. 36˚00' S; Long.
056˚00' W to Lat. 34˚ 00' N; Long. 018˚15' E
?
3557 nm;
112˚T
3214 nm,
046.9˚T
3196 nm;
313˚T
3593 nm;
148.1˚T
271 Determine the great circle distance and
intial course from Lat. 24˚52' N; Long.
078˚27' W to Lat. 47˚ 19' N; Long. 006˚ 42'
W ?
3593 nm;
048.1˚T
3214 nm,
046.9˚T
3557 nm;
112˚T
3196 nm;
313˚T
272 The great circle distance from Lat. 35˚57.2'
N, Long. 005˚45.7' W to Lat. 24˚25.3' N;
Long 083˚02.6' W is 3966.5 nautical miles
and the initial course is 283.7˚T. The
latitude of the vertex is 38˚09.4' N. What is
the longitude of the vertex?
028˚ 18.5' W 028˚ 12.5' W 028˚ 38.5' W 028˚ 47.7' W
273 The great circle distance from Lat. 08˚50' N,
Long. 080˚21' W to Lat. 12˚36' N; Long
128˚16' E is 8664 nautical miles and the
initial course is 306.6˚T. The latitude of the
vertex is 37˚39.6' N. What is the longitude
of the vertex?
157˚44' W 157˚44' E 159˚32' W 167˚ 24' W
274 You are on a great circle track departing
from LAT. 25˚50' N; LONG. 077˚00' W and
your initial course is 061.7˚T. The position
of the vertex is LAT 37˚35.6' N; LONG.
025˚57.8' W. What is the distance along
the great circle track between the point of
dep
2664.9 nm 3557 nm 3214 nm 8664 nm
275 The great circle distance from Lat. 35˚08' S,
Long. 019˚26' E to Lat. 33˚16' S; Long
115˚36' E is 4559 nautical miles and the
initial course is 121˚T. Determine the
latitude of the vertex?
45˚30' S 44˚29' S 46˚35.9' N 43˚41' S
276 The latitude and longitude of the vertex
along your great circle course is 38˚15'S,
168˚19'W. Your vessel is on course 102˚T.
Which of the following is your course when
crossing the equator?
051.8˚T 088.4˚T 054.3˚T 161˚T
277 The latitude and longitude of the vertex
along your great circle course is 38˚15'S,
168˚19'E. Your vessel is on course 060˚T.
Which of the following is your longitude
when crossing the equator?
101˚21' W 101˚21' E 078˚39' W 078˚39' E
278 The latitude and longitude of the vertex
along your great circle course is 43˚32'S,
039˚18' E. Your vessel is on course 246˚T.
Which of the following is your course when
crossing the equator?
313.5˚ T 306.3˚ 226.5˚ T 230.7˚ T
279 A great circle crosses the equator at 134˚ E.
It will also cross the equator at what other
longitude?046˚ W 124˚ W 134˚ W 161˚ W
280 A great circle crosses the equator at 114˚ E.
It will also cross the equator at what other
longitude?066˚ W 046˚ W 114˚ W 046˚ E
281 A great circle crosses the equator at 114˚
W. It will also cross the equator at what
other longitude?066˚ E 114˚ E 124˚ W 134 E
282 A great circle crosses the equator at 086˚ E.
It will also cross the equator at what other
longitude?094˚ W 046˚ W 086˚ W 161˚ W
283 A great circle crosses the equator at 157˚
W. It will also cross the equator at what
other longitude? 023˚ E 157˚ E 023˚ W 066˚ E
284 A great circle crosses the equator at 049˚
W. It will also cross the equator at what
other longitude?131˚ E 131˚ W 049˚ E 094˚ W
285 A great circle crosses the equator at 102˚ E.
It will also cross the equator at what other
longitude? 078˚ W 078˚ E 102˚ W 023˚ E
286 A great circle crosses the equator at 012˚
35' E. It will also cross the equator at what
other longitude? 167˚ 25' W 167˚ 25' E 67˚ 25' W 012˚ 36' E
287 A great circle crosses the equator at 032˚
35' W. It will also cross the equator at what
other longitude?147˚25' E 147˚25' W 157˚25' W 032˚35' E
288 A great circle crosses the equator at 078˚
45' E. It will also cross the equator at what
other longitude? 101˚15' W 101˚15' E 11˚15' W 078˚45' W
289 A great circle crosses the equator at 120˚ E.
It will also cross the equator at what other
longitude?060˚ W 120˚ W 060˚ E 078˚ W
290 A great circle crosses the equator at 120˚
W. It will also cross the equator at what
other longitude? 060˚ E 060˚ W 078˚ W 120˚ E
291 The longitude of the upper vertex of a great
circle track is 169˚ E. What is the longitude
of the lower vertex? 011˚ W 011˚ E 169˚ W 076˚ E
292 The longitude of the upper vertex of a great
circle track is 011˚ W. What is the longitude
of the lower vertex? 169˚ E 169˚ W 011˚ E 060˚ W
293 The longitude of the upper vertex of a great
circle track is 134˚ E. What is the longitude
of the lower vertex?046˚ W 134˚ W 046˚ E 169˚ E
294 The latitude of the upper vertex of a great
circle is 36˚ N. What is the latitude of the
lower vertex?36˚ S 36˚N 63˚ N 54˚ N
295 The latitude of the upper vertex of a great
circle is 63˚ N. What is the latitude of the
lower vertex? 63˚S 36˚ S 36˚N 27˚N
296 The latitude of the upper vertex of a great
circle is 27˚ N. What is the latitude of the
lower vertex?27˚S 63˚S 63˚N 36˚ S
297 The latitude of the upper vertex of a great
circle is 54˚ S. What is the latitude of the
lower vertex? 54˚N 36˚ N 45˚N 36˚ S
298 The latitude of the upper vertex of a great
circle is 46˚ S. What is the latitude of the
lower vertex?46˚N 34˚N 63˚S 27˚S
299 The latitude of the upper vertex of a great
circle is 30˚ S. What is the latitude of the
lower vertex? 30˚N 60˚N 27˚S 63˚S
300 What is the difference of longitude
between the intersection of the great circle
and the equator to the lower vertex? 90 deg. 120 deg. 180 deg.T 45 deg.
301 What is the difference of longitude
between the intersection of the great circle
and the equator to the upper vertex? 90 deg. 145 deg. 180 deg.T 34 deg.
302 The vertex of a great circle track in Long.
109˚ E. An eastbound vessel will cross the
equator in what longitude? 161˚ W 161˚ E 19˚ E 19˚ W
303 The vertex of a great circle track is Long.
121˚ E. An eastbound vessel will cross the
equator in what longitude?149˚ W 149˚ E 59˚ W 59˚ E
304 The vertex of a great circle track is Long.
134˚ E. An eastbound vessel will cross the
equator in what longitude? 136˚W 44˚W 44˚E 146˚W
305 The vertex of a great circle track is Long.
029˚ E. An eastbound vessel will cross the
equator in what longitude? 119˚ E 119˚ W 061˚ E 061˚ W
306 The vertex of a great circle track is Long.
079˚ E. An eastbound vessel will cross the
equator in what longitude?169˚ E 169˚ W 011˚ E 011˚ W
307 The vertex of a great circle track is Long.
029˚ W. An eastbound vessel will cross the
equator in what longitude?061˚ E 061˚ W 119˚ E 119˚ W
308 The vertex of a great circle track is Long.
029˚ W. A westbound vessel will cross the
equator in what longitude?119˚ W 029˚ E 061˚ E 119˚ E
309 The vertex of a great circle track is Long.
134˚ E. A westbound vessel will cross the
equator in what longitude? 044˚E 044˚W 136˚ W 134˚ W
310 The vertex of a great circle track is Long.
109˚ E. A westbound vessel will cross the
equator in what longitude? 019˚ E 019˚ W 161˚ W 161˚ E
311 The vertex of a great circle track is Long.
121˚ E. A westbound vessel will cross the
equator in what longitude? 031˚ E 031˚ W 149˚ W 149˚ E
312 The vertex of great circle track is Long. 121˚
W. An eastbound vessel will cross the
equator in what longitude? 031˚ W 031˚ E 149˚ W 149˚ E
313 The upper vertex of great circle track is at
Long. 158˚ W. An eastbound vessel will
cross the equator in what longitude? 068˚ W 068˚ E 112˚ W 112˚ E
314 The upper vertex of great circle track is
Long. 144˚ W. A westbound vessel will
cross the equator in what longitude? 126˚ E 126˚ W 054˚ E 054˚ W
315 The vertex of great circle track is Long. 168˚
W. An eastbound vessel will cross the
equator in what longitude? 078˚ W 078˚ E 102˚ W 102˚ E
316 The difference of longitude between the
upper vertex and the lower vertex of a
great circle is _____. 180 deg. 90 deg. 360 deg. 45 deg.
317 A ship following a great circle track crosses
the equator at long. 135˚ 00' E on course
051.8˚T. If she continues along this great
circle track, find the latitude and longitude
of the upper vertex.
Lat. 38˚12' N;
Long. 135˚ 00'
W
Lat. 51˚12' N;
Long. 135˚ 00'
W
Lat. 58˚12' N;
Long. 135˚ 00'
E
Lat. 38˚12' N;
Long. 135˚ 00'
E
318 Determine the latitude and longitude of the
vertex along your great circle track when
going from Lat. 35˚ 17.6' N; Long.144˚ 23'
E to Lat.47˚ 36' N; Long. 124˚ 22' W.
Lat. 52˚47.8'
N;
Long. 158˚
07.3' W
Lat. 48˚56.4'
N;
Long. 143˚
36.4' E
Lat. 38˚12' S;
Long. 135˚ 00'
W
Lat. 38˚12' N;
Long. 135˚ 00'
W
319 Determine the great circle distance and
initial course from Lat 08˚ 36' N, Long. 126˚
17' E to Lat. 02˚12' S, Long. 081˚ 53' W. 9076 miles,
079˚T
9076 miles,
097˚T
9106 miles,
069˚T
9760 miles,
085˚T
320 The great circle distance from Lat. 38˚17' N;
Long. 123˚ 16' W to Lat. 35˚ 01' N; Long.
142˚ 21' E is 4330 nautical miles and the
initial course is 300.9˚ T Determine the
latitude and longitude of the vertex.
Lat. 47˚39.5'
N;
Long. 167˚
18.5' W
Lat. 52˚47.8'
N;
Long. 158˚
07.3' W
Lat. 38˚12' N;
Long. 135˚ 00'
W
Lat. 47˚39.5'
S;
Long. 167˚
18.5' E
321 You receive a distress call from a vessel
reporting her position as Lat. 30˚21' N;
Long. 088˚34' W. Your position is at Lat.
24˚30' N; Long. 083˚00' W. Determine the
true course and distance to the distress
scene by Mercator Sailing.
320˚ T; dist.
460 nm
322˚T; dist
455nm
312˚T; dist
470nm
320˚T; dist
450nm
322 By Mercator sailing, determine the course
and distance when sailing from Lat 43˚08'
N; Long. 005˚56' E to Lat. 39˚ 29' N.; Long.
000˚ 24' W.
233˚T, 361
miles
053˚T, 361
miles
060˚T, 439
miles
240˚T, 452
miles
323 By Mercator sailing, determine the course
and distance when sailing from Lat 00˚00' ;
Long. 000˚03' W to Lat. 51˚ 12' N.; Long.
016˚ 14' E.
015˚T, 3185
nm
015˚T, 5299
nm
345˚ T, 3184
nm
195˚ T, 2273
nm
324 By Mercator sailing, determine the course
and distance when sailing from Lat 15˚12' S;
Long. 002˚12' E to Lat. 28˚ 49' S.; Long.
017˚ 14' E.
134˚T, 1171
miles
046˚T, 1171
miles
226˚ T, 817
miles
048˚ T, 1307
mles
325 By Mercator sailing, determine the course
and distance when sailing from Lat 08˚04' S;
Long. 034˚53' W to Lat. 14˚ 45' N.; Long.
017˚ 33' W.
037˚ T, 1718
miles
053˚ T, 2264
miles
143˚ T, 2262
miles
323˚ T, 1718
miles
326 A vessel at Lat. 38˚ 03' S, Long. 049˚ 38' W
heads for a destination at Lat, 41˚ 26' S,
Long. 038˚ 32' W. Determine the true
course and distance by Mercator Sailing.111.5˚ 113.5˚ 121.5˚ 211.5˚
327 A vessel at Lat. 21˚ 18.5' N, Long. 157˚ 52.2'
W heads for a destination at Lat, 08˚ 53' N,
Long. 079˚ 31' W. Determine the true
course and distance by Mercator Sailing.099˚ T,
4617.5 miles
099˚ T,
4915.8 miles
081˚ T,
4617.5 miles
081˚ T,
4617.5 miles
328 A vessel steams 1082 miles on course 047˚
T from lat. 37˚18' N; Long. 024˚ 40' W.
What is the latitude and longitude of the
point of arrival by Mercator Sailing.
Lat. 49˚36' N;
Long. 006˚ 28'
W
Lat. 49˚30' N;
Long. 006˚ 22'
W
Lat. 49˚33' N;
Long. 006˚ 25'
W
Lat. 49˚39' N;
Long. 006˚ 31'
W
329 A vessel at Lat. 28˚ 00' N, Long. 116˚ 00' W
heads for a destination at Lat, 34˚ 00' N,
Long. 123˚ 40' W. Determine the true
course and distance by Middle Latitude
Sailing.
312˚ T, 533
miles
323˚ T, 428
miles
324˚ T, 453
miles
302˚ T, 536
miles
330 A vessel at Lat. 20˚ 10' N, Long. 122˚ 00' E
heads for a destination at Lat, 26˚ 18' N,
Long. 128˚ 20' E. Determine the true
course and distance by Middle Latitude
Sailing.
043.5˚ T,
507.3 miles
041.5˚ T,
501.3 miles
041.9˚ T,
503.6 miles
048.5˚ T,
509.7 miles
331 A vessel at Lat. 49˚ 45' N, Long. 006˚ 35' W
heads for a destination at Lat, 25˚ 50' N,
Long. 077˚ 00' W. Determine the true
course and distance by Mercator or middle
latitude Sailing.
246˚ T, 3597
miles
066˚ t, 3602
miles
268˚ T, 3602
miles
259˚T, 3660
miles
332 A ship sailed on course 326˚T from Latitude
20˚ 58.8' S, Long. 012˚ 37.6' E. For a
distance of 311 nautical miles. Find the
arrival longitude by mercator sailing.
Lat. 16˚41' N;
Long. 009˚
34.9' E
Lat. 16˚39' N;
Long. 009˚
11.9' E
Lat. 16˚44' N;
Long. 009˚
12.1' E
Lat. 16˚16' N;
Long. 009˚
30.9' E
333 A ship sails from Lat. 30˚20' N and steams
going south (180) for a distance of 72 miles.
What is her arrival latitude? 29˚ 08' N 29˚ 08' S 29˚ 28' N 28˚ 08' N
334 A ship sails from Lat. 20˚30' N and steams
going south (180) for a distance of 72 miles.
What is her arrival latitude? 19˚18' N 29˚ 08' N 20˚03' N 20˚18' N
335 A ship sails from Lat. 03˚20' N and steams
going south (180) for a distance of 182
miles. What is her arrival latitude? 00˚18' N 00˚18' S 01˚18' N 10˚18' S
336 A ship sails from Lat. 30˚20' S and steams
going south (180) for a distance of 180
miles. What is her arrival latitude? 33˚20' S 29˚ 08' N 19˚ 08' N 19˚18' N
337 A ship sails from Lat. 46˚22' S and steams
going south (180) for a distance of 372
miles. What is her arrival latitude? 52˚34' S 40˚10' N 40˚10' S 33˚20' S
338 A ship sails from Lat. 52˚34' S and steams
going north (000) for a distance of 372
miles. What is her arrival latitude? 46˚22' S 33˚20' S 40˚10' N 58˚46' S
339 A ship sails from Lat. 52˚34'' S and steams
going south (180) for a distance of 372
miles. What is her arrival latitude? 58˚46' S 46˚22' S 33˚20' S 40˚10' S
340 A ship sails from Lat. 34˚54' N and steams
going south (180) for a distance of 372
miles. What is her arrival latitude? 28˚42' N 28˚42' S 52˚34' N 41˚06' N
341 A ship sails from Lat. 34˚54' N and steams
going north (000) for a distance of 372
miles. What is her arrival latitude? 41˚06' N 28˚42' N 52˚34' N 46˚22' N
342 A ship sails from Lat. 46˚22' N and steams
going south (180) for a distance of 372
miles. What is her arrival latitude? 40˚10' N 40˚10' S 52˚34' N 52˚34' S
343 At 1210 LZT, on 01 December 2007, you
depart Seattle at Lat. 47˚ 36' N; Long. 122˚
22' W (ZD+8). You are bound for Guam,
Lat 13˚ 27' N; Long. 144˚ 37' E and you
estimate your speed of advance at 20
knots. The distance is 4,948 miles. What is
your estimated zone time of arrival in
Guam?
1334, 12
December
0600, 31
December
2154, 04
December
1934, 11
December
344 At 0915 LZT, on 07 November 2007, you
depart Seattle at Lat. 47˚ 36' N; Long. 122˚
22' W (ZD+8). You are bound for Kobe, Lat
34˚ 40' N; Long. 135˚ 12' E and you estimate
your speed of advance at 18.5 knots. The
distance is 4,527 miles. What is your
estimated zone time of arrival at Kobe?
0657, 18
November
1900, 13
November
0657, 19
November
1857, 18
November
345 At 1820 LZT, on 21 March 2007, you depart
San Francisco at Lat. 37˚ 48.5' N; Long. 122˚
24' W (ZD+8). You are bound for
Melbourne, Lat 37˚ 49.2' S; Long. 144˚ 56' E
and you estimate your speed of advance at
21 knots. The distance is 6,970 miles.
What is your estimated zone time of arrival
at Melbourne?
0814, 05 April 1214, 05 April 2214. 05 April 1314, 05 April
346 At 0915 LZT, on 26 July 2007, you depart
Yokohama at Lat. 37˚ 27' N; Long. 139˚ 39' E
(ZD-9). You are bound for Seattle, Lat 47˚
36' N; Long. 122˚ 22' W and you estimate
your speed of advance at 14 knots. The
distance is 4,245 miles. What is your
estimated zone time of arrival at Seattle?
0728, 07
August
0028, 07
August
1528, 07
August
1528, 08
August
347 At 0600 LZT, on 22 October 2007, you
depart Manila at Lat. 14˚ 35' N; Long. 120˚
58' E (ZD-8). You are bound for Los
Angeles, Lat 33˚ 46' N; Long. 118˚ 11' W and
you estimate your speed of advance at 20.2
knots. The distance is 6385.9 miles. What
is your estimated zone time of arrival at Los
angeles?
1808, 03
November
0657, 18
November
1008, 04
November
0208, 03
November
348 At 0530 LZT, on 20 December 2007, you
depart Capetown, South Africa (ZD-1). You
are bound for New York (ZD +5), and you
estimate your speed of advance at 25
knots. The distance is 6762 miles. What is
your estimated zone time of arrival at New
York?
0600, 31
December
1200, 31
December
0700, 31
December
1100, 31
Decmeber
349 Your ship will sail from a position in LAT
08˚51'N; LONG. 081˚31' W to position at
LAT 33˚ 51.5' S; LONG 151˚13' E. The
distance by great circle is 7635 miles, and
you estimate an average speed of 15 knots.
Find your estimated zone time of arrival if
you depart at 1510 ZT on July 23?
1110, 14
August
1110, 16
August
0110, 15
August
1510, 17
August
350 You are on a voyage from New York, USA,
to San Francisco, USA. The distance from
pilot to pilot is 5132 miles. The speed of
advance is 13.5 knots. You estimate 32
hours for bunkering at Colon, and 14 hours
for the Panama Canal Transit. If you take
departure at 0600 hours (ZD+4) on 16 May,
what is your ETA (ZD+7) at San Francisco?
2109, 02 June 0609, 01 June 0009, 03 June 0250, 02 June
351 You are on a voyage from Limoy, Costa
Rica, to Los angeles, USA. The distance
from pilot to pilot is 3150 miles. The speed
of advance is 14 knots. You estimate 24
hours for bunkering at Colon, and 12 hours
for the Panama Canal Transit. If you take
departure at 1836 hours (ZD+6) on 28
January, find your ETA (ZD+8) at Los
angeles?
1336, 08
February
1736, 09
February
1736, 08
February
0536, 08
February
352 You are on a voyage from
Baltimore,Mainland USA, to Seattle,
Washington, USA. The distance from pilot
to pilot is 5960 miles. The speed of advance
is 16 knots. You estimate 16 hours for
bunkering at Colon, and 12 hours for the
Panama Canal Transit. If you take departure
at 0824 hours (ZD+5), 18 November, find
ETA (ZD+8) at Seattle?
2154, 04
December
1654, 05
December
1354, 05
December
1354, 04
December
353 You are on a voyage from Halifax, Nova
Scotia, to Galveston, TX. The distance from
pilot to pilot is 2138 miles. The speed of
advance is 12.5 knots. You estimate 18
hours for bunkering enroute at Port
Everglades, FL. If you sail at 0648 hours
(ZD+4), on, on June 12, what is your ETA
(ZD+5) at Galveston?
0250, 20 June 2109, 20 June 0550, 20 June 1350, 20 June
354 You are on a voyage from Valdez, Alaska, to
the Panama Canal. The distance from pilot
to pilot is 4950 miles. The speed of advance
is 15 knots. You estimate a layover at San
Francisco, CA of 36 hours If you take
departure at 0800 hours (ZD+10), on 29
October, what is your ETA (ZD+5) at
Panama Canal?
1900, 13
November
1808, 13
November
0657, 18
November
0900, 13
November
355 You are on a voyage from Belem. Brazil, to
Mobile, Alabama. The distance from pilot
to pilot is 3150 miles. The speed of advance
is 14 knots. You estimate a layover at San
Juan, Puerto Rico of 17.5 hours If you take
departure at 2200 hours (ZD+3h 30m), on
26 February 2007, what is your ETA (ZD+6)
at Mobile?
2200, 08
March
1900, 08
March
0500, 08
March
2132, 17
March
356 At 0915 zone time, on 06 March, you
depart Sydney, Australia in LAT. 33˚ 51.5' S;
LONG. 151˚ 13.0' E (ZD-10). You are bound
for Kodiak, LAT. 57˚ 47' N; LONG. 152˚ 25.0'
W. If you estimate your speed of advance
to be 21 knots and the distance is 6,222
miles. What is your ETA at Kodiak?
2132, 17
March
2200, 08
March
0732, 17
March
0728, 18
March
357 You are on a voyage from San Diego, CA, to
New York, USA. The distance from pilot to
pilot is 4860 miles. The speed of advance is
15 knots. You estimate 18 hours for
bunkering at Colon, and 14 hours for the
Panama Canal Transit. If you take departure
at 0836 hours (ZD+7), 4 July, what is your
ETA (ZD+4) at New York?
0736, 19 July 1336, 19 July 0036, 19 July 0336 20 July
358 At 0800 zone time, on 15 April, your vessel
is heading west in position LAT.15˚ 10' N;
LONG. 165˚15' W at a speed of 22 knots.
The distance to your destination at LAT. 15˚
10' N; LONG. 135˚ 15' E is 3600 nautical
miles. What is your ETA ?
2339, 22 April 0814, 25 April 1439, 21 April 0536, 22 April
359 On Novemeber 21 at 2100 zone time,you
depart Pt. A (ZD+5) enroute to Pt. B (ZD+1).
The total distance is 3519 nautical miles.
What will be the speed to use in order to
arrive at Pt. B on December 3 at 1830 zone
time?
12.5 knots 12.0 knots 13.0 knots 13.5 knots
360 On September 13 at 1936 hours, your ship
was in Lat. 21˚32' N; Long. 070˚ 18' W. On
Sept. 14 at 1854 hours, your ship was in
Lat. 018˚ 15' N; Long. 065˚ 24' W. What is
your speed if your total distance run is 341
nautical miles?
15.3 knots 14.6 knots 15.8 knots 13.8 knots
361 You are departing San Francisco, California
(ZD+8) on Oct. 10 at 1200 LZT bound for
Yokohama, japan (ZD+9) with a total
distance of 4536 miles. What will be your
approximate speed if you plan to arrive
Yokohama on Oct. 19 at about 1900 LZT?
22.0 knots 21.0 knots 21.5 knots 22.5 knots
362 The GMT is 0445 hours and your zone
description is +1, your local zone time is
_____. 0345 hours 0445 hours 0545 hours 1545 hours
363 You are at longitude 124˚00' E and your
local mean time is 0520H on the 5th of the
month. What is the mean time at
Greenwich?
2104H on the
4th
1336H on the
4th
1336H on the
5th
2104H on the
5th
364 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 099˚ 15'E. What will
be the LZT of sunrise?0615H 2315H 0552H 0152H
365 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 099˚ 15'W. What will
be the LZT of sunrise?0529H 0615H 1229H 0552H
366 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 090˚ 00'E. What will
be the LZT of sunrise?0552H 0529H 0615H 1152H
367 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 099˚ 15'E. What will
be the GMT of sunrise?2315H 0552H 0529H 0615H
368 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 099˚ 15'W. What will
be the GMT of sunrise?1229H 2315H 0615H 0552H
369 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 120˚ 00'E. What will
be the LZT of sunrise?0552H 1352H 2152H 0529H
370 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 124˚ 00' E. What will
be the LZT of sunrise?0536H 0552H 0816H 2136H
371 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 116˚ 00' E. What will
be the LZT of sunrise?0608H 0536H 0148H 0615h
372 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 06h 00 min.
You are at Longitude 116˚ 00' E. What will
be the LZT of sunrise?0616H 0544H 0144H 0610H
373 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 06h 00 min.
You are at Longitude 124˚ 00' E. What will
be the LZT of sunrise?0544H 0600H 0616H 0536h
374 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 120˚ 00'W. What will
be the LZT of sunrise?0552H 0600H 0615H 0544H
375 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 116˚ 00'W. What will
be the LZT of sunrise?0536H 0544H 0616H 0608H
376 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 124˚ 00'W. What will
be the LZT of sunrise?0608H 0536H 0616H 0529H
377 The LMT of sunrise as tabulated in the
Nautical Almanac indicates 05h 52 min.
You are at Longitude 075˚ 00'W. What will
be the LZT of sunrise?0552H 0529H 0600H 2136H
378 The LMT of sunrise is 04h 30min. At LAT.
48˚55' N. LONG. 078˚ 18' W. Find the GMT
of sunrise. 09h 43m 12s 09h 16m 00s 09h 31m 03s 09h 20m 20s
379 The equation of time is12m 00s and the
mean sun is ahead of the apparent sun. If
you are in the central meridian of your time
zone, at what zone time will the apparent
sun cross the meridian?
1212H 1200H 1148H 1130H
380 The equation of time is12m 00s and the
apparent sun is ahead of the mean sun. If
you are in the central meridian of your time
zone, at what zone time will the apparent
sun cross the meridian?
1148H 1212H 1200H 1142H
381 The equation of time is16m 00s and the
apparent sun is ahead of the mean sun. If
you are in the central meridian of your time
zone, at what zone time will the apparent
sun cross the meridian?
1144H 1216H 1212H 1200H
382 The equation of time is16m 00s and the
mean sun is ahead of the apparent sun. If
you are in the central meridian of your time
zone, at what zone time will the apparent
sun cross the meridian?
1216H 1212H 1144H 1244H
383 The LMT of meridian passage taken from
the nautical almanac indicates 1210H. You
are at longitude 070˚ 30' E. What time
would you use to enter in the nautical
almanac to determine the declination of
the sun at local apparent noon (LAN)?
0728H 1652H 1842H 0652H
384 What is the geographical latitude of a body
whose declination is 23˚27' N? 23˚ 27'N 23˚ 27' S 27˚ 33' N 66˚ 33' S
385 What is the geographical latitude of star
"Deneb" whose declination is 45˚16' N? 45˚ 16' N 45˚ 44' N 44˚44' N 90˚00'
386 What is the geographical latitude of star
"Rigel" whose declination is 08˚ 12' S? 08˚ 12' S 81˚ 48' N 08˚ 12' N 81˚ 12' N
387 What is the geographical latitude of a body
whose declination is 66˚33' S? 66˚ 33'S 23˚ 27' N 66˚ 33' N 23˚ 27' S
388 What is the geographical longitude of a
body whose GHA is 127˚ 33' ? 127˚ 33' W 127˚ 33' E 052˚ 27' E 052˚ 27' W
389 What is the geographical longitude of a
body whose GHA is 149˚30' ? 149˚ 30' W 149˚ 30' E 127˚ 33' W 59˚ 30' E
390 What is the geographical longitude of a
body whose GHA is 232˚27' ? 127' 33' E 127˚ 33' W 149˚ 30' W 052˚ 27' W
391 What is the geographical longitude of a
body whose GHA is 210˚ 30' ? 149˚ 30' E 149˚ 30' W 127' 33' E 127˚ 33' W
392 What is the geographical longitude of a
body whose GHA is 279˚30' ? 080˚ 30' E 080˚ 30' W 180˚ 127' 33' E
393 The GP of a celestial body is Lat. 20˚ 36' S
and Long. 074˚ 10' E. Find its GHA and
declination on the celestial sphere. GHA = 285˚ 50'
Dec. = 20˚ 36' S
GHA = 295˚
10'
Dec. = 20˚ 36'
N
GHA = 074˚
50'
Dec. = 20˚ 36'
S
GHA = 285˚
50'
Dec. = 20˚ 36'
N
394 The GP of a celestial body is Lat. 15˚ 40' S
and Long. 074˚ 10' W. Find its GHA and
declination on the celestial sphere. GHA = 074˚ 10'
Dec. = 15˚ 40' S
GHA = 285˚
50'
Dec. = 20˚ 36'
S
GHA = 074˚
10'
Dec. = 15˚ 40'
N
GHA = 185˚
10'
Dec. = 15˚ 40'
S
395 The GP of a celestial body is Lat. 45˚ 00' N
and Long. 090˚ 00' E. Find its GHA and
declination on the celestial sphere. GHA = 270˚ 00'
Dec. = 45˚'00' N
GHA = 070˚
00'
Dec. = 45˚ 00'
S
GHA = 270˚
00'
Dec. = 00˚ 45'
N
GHA = 090˚
00'
Dec. = 00˚ 45'
N
396 The GP of a celestial body is Lat. 23˚ 27' N
and Long. 114˚ 20' W. Find its GHA and
declination on the celestial sphere.GHA = 114˚
20'
Dec. = 23˚'27'
N
GHA = 245˚
40'
Dec. = 23˚'27'
S
GHA = 245˚
40'
Dec. = 23˚'20'
N
GHA = 245˚
00'
Dec. = 23˚'27'
N
397 A vessel heading magnetic north and its
magnetic compass indicates a heading of
356 deg. What action should be done to
remove this error during compass
adjustment?
If the red
ends of the
magnets are
to starboard,
and the
athwartship
tray is at the
top, you
should add
some more
magnets
If the red ends
of the
magnets are
to port, you
should raise
the
athwartship
tray
If the red ends
of the
magnets are
to port, and
the
athwartship
tray is at the
top you
should add
some more
magnets
If the red ends
are to
starboard, you
should lower
the
athwartship
tray.
398 A vessel is heading magnetic east and its
magnetic compass indicates a heading of
076 deg. What action should be taken to
remove this error during compass
adjustment?
If the blue
ends of the
magnets are
aft, and the
fore-and-aft
tray is at the
top, you
should add
some
magnets
If the blue
ends of the
magnets are
aft, you
should lower
the fore and
aft tray
If the blue
ends of the
magnets are
aft, and the
fore-and-aft
tray is at the
top, reverse
the magnets
If the blue
ends of the
magnets are
forward, and
the fore-and -
aft tray is at
the bottom,
you should
add some
magnets
399 A vessel is heading magnetic east and its
magnetic compass indicates a heading of
086 deg. What action should be taken to
remove this error during compass
adjustment?
If the blue
ends of the
magnets are
aft, and the
fore-and-aft
tray is at the
top, you
should add
some
magnets
If the blue
ends of the
magnets are
aft, you
should lower
the fore and
aft tray
If the blue
ends of the
magnets are
aft,and the
fore and aft
tray is at the
top, you
should
reverse the
magnets
If the blue
ends of the
magnets are
forward, and
the fore and
aft tray is at
the bottom,
you should
add some
magnets
400 A vessel is heading magnetic east and its
magnetic compass indicates a heading of
086 deg. What action should be taken to
remove this error during compass
adjustment?If the red
ends of the
magnets are
aft, you
should lower
the fore-and-
aft tray
If the red ends
of the
magnets are
to port, you
should lower
the
athwartship
tray
If the blue
ends of the
magnets are
to port, and
the
athwartship
tray is at the
top, you
should
remove some
of the
magnets
If the red ends
of the
magnets are
aft, and the
fore-and-aft
tray is at the
top, you
should add
some more
magnets
401 A vessel is heading magnetic east and its
magnetic compass indicates a heading of
093 deg. What action should be taken to
remove this error during compass
adjustment?
If the red
ends of the
magnets are
forward, and
the fore-and-
aft tray is at
the bottom,
you should
remove some
magnets
If the red ends
of the
magnets are
aft you should
lower the fore-
and-aft tray
If the red ends
of the
magnets are
to port, you
should raise
the
athwartship
tray
If the red ends
of the
magnets are
to port,and
the
athwartship
tray is at the
top, you
should
reverse the
magnets
402 A vessel is heading magnetic east and its
magnetic compass reads a heading of 093
deg. What action should be taken to
remove this error during compass
adjustment?
If the red
ends of the
magnets are
aft, you
should raise
the fore and
aft tray.
If the red ends
of the
magnets are
aft, and the
fore and aft
tray is at the
top, you
should
remove some
magnets
If the red ends
are aft and
the fore and
aft tray is at
the bottom,
you should
reverse the
magnets
If the blue
ends of the
magnets are
forward you
should
remove some
magnets from
the fore and
aft tray
403 A vessel is heading magnetic east and its
magnetic compasss indicates a heading of
086 deg. What actio should be taken to
remove this error during compass
adjustment?
If the blue
ends of the
magnets are
aft, and the
fore and aft
tray is at the
top, you
should add
some
magnets
If the blue
ends of the
magnets are
forward, you
should raise
the fore-and-
aft tray
If the blue
ends of the
magnets are
aft, you
should lower
the fore-and-
aft tray
If the blue
ends of the
magnets are
aft, and the
fore-and-aft
tray is at the
bottom, you
should
reverse the
magnets
404 A vessel is heading magnetic east and its
magnetic compasss indicates a heading of
093 deg. What action should be taken to
remove this error during compass
adjustment?
If the blue
ends of the
magnets are
forward you
should raise
the fore-andf-
aft tray
If the blue
ends of the
magnets are
to port you
should raise
the
athwartship
tray
If the red ends
of the
magnets are
to port you
should lower
the
athwartship
tray
If the red ends
of the
magnets are
aft you should
lower the fore-
and-aft tray
405 A vessel is heading magnetic north and its
magnetic compass indicates a heading of
003 deg. What action should be done to
remove this error during compass
adjustment?
Raise or lower
the
athwartship
magnets
Move the
quadrantal
spheres lower
closer to the
compass
Raise the
heeling
magnet if the
red end is up
Remove some
of the flinders
bar
406 A vessel is heading magnetic north and its
magnetic compass indicates a heading of
003 deg. What action should be done to
remove this error during compass
adjustment?
If the red
ends are to
starboard, the
athwarthship
magnets
should be
lowered
If the blue
ends are
forward, the
fore-and-aft
magnets
should be
raised
If the red ends
are to
starboard and
the tray is at
the top, add
some
athwartship
magnets
If the blue
ends are aft,
the fore-and-
aft magnets
should be
raised
407 A vessel is heading magnetic north and its
magnetic compass indicates a heading of
356 deg. What action should be done to
remove this error during compass
adjustment?
If the red
ends of the
magnets are
to port, you
should lower
the
athwartship
tray tray
If the red ends
of the
magnets are
aft you should
raise the fore
and aft tray
If the blue
ends of the
magnets are
to port, and
the
athwartship
tray is at the
top, you
should
remove some
of the
magnets
If the blue
ends of the
magnets are
aft, you
should raise
the fore-and-
aft tray
408 A vessel is heading magnetic north and its
magnetic compass is indicating a heading of
356 deg. What action should be taken to
remove this error during compass
adjustment?
If the blue
ends of the
magnets are
to starboard,
and the
athwartship
tray is at the
bottom, you
should
remove some
magnets
If the red ends
of the
magnets are
to starboard,
and the
athwartship
tray is at the
bottom, you
should
reverse the
magnets
If the blue
ends of the
magnets are
to starboard,
you should
raise the
athwartship
tray
If the blue
ends of the
magnets are
to port, and
the
athwartship
tray is at the
top, you
should
remove some
magnets
409 A vessel is heading magnetic north and its
magnetic compass is indicating is heading
of 003 deg. What action should be taken to
remove this error during compass
adjustment?
If the red
ends are to
starboard,
and the
athwartship
tray is at the
bottom, you
should
remove some
magnets.
If the red ends
are to
starboard, you
should raise
the
athwartship
tray.
If the red ends
are to port
and the
athwartship
tray is at the
top, you
should
reverse the
magnets
If the red ends
are to port
and the
athwartship
tray is at the
top, you
should lower
the tray.
410 A vessel is heading magnetic northwest and
its magnetic compass indicates a heading of
312 deg. What action should be done to
remove this error during compass
adjustment?Any of these
If the
quadrantal
spheres are all
the way out,
replace them
with smaller
spheres
If the
quadrantal
spheres are all
the way out,
remove one of
the spheres
Move the
spheres out
411 A vessel is heading magnetic northwest and
its magnetic compass indicates a heading of
312 deg. What action should be taken to
remove this error during compass
adjustment?
If the
quadrantal
spheres are
all the way
out, replace
them with
smaller
spheres
If the
quadrantal
spheres are all
the way in,
replace them
with larger
spheres
Move the
spheres inany of these
412 A vessel is heading magnetic northwest and
its magnetic compass indicates a heading of
317 deg. What action should be taken to
remove this error during compass
adjustment?
If the
quadrantal
spheres are in
as far as
possible,
replace them
with larger
spheres
If the
quadrantal
spheres are in
as possible,
replace them
with smaller
spheres
Move the
quadrantal
spheres out
If the spheres
are in as
possible
remove one of
the spheres
413 A vessel is heading magnetic northwest and
its magnetic compass reads a heading of
317 deg. What action should be taken to
remove this error dutring compass
adjustment? Move the
quadrantal
spheres in
If the
quadrantal
spheres are
out as far as
possible
replace them
with smaller
spheres
If the
quadrantal
spheres are in
as far as
possible
remove one of
the spheres
If the
quadrantal
spheres are in
as far as
posssible
replace them
with smaller
spheres
414 You have completed the compass
adjustment on magnetic east and magnetic
south. The vessel is now steady on
magnetic north but the compass reads 004
deg. You should now adjust the compass
until reads ______?
002 deg. 356 deg. 358 deg. 000 deg.
415 You have completed the compass
adjustment on magnetic east and magnetic
south. The vessel is now steady on
magnetic west but the compass reads 266
deg. What action should be taken to
remove this error of the compass?
Adjust the
compass with
the fore and
aft magnets
until the
compass
reads 268
deg.
Adjust the
compass with
the
athwartships
magnets until
the magnetic
compass
reads 268 deg.
Adjust the
compass with
the fore and
aft magnets
until the
magnetic
compass
reads 270 deg.
Adjust the
compass with
the
quadrantal
spheres until
the magnetic
compass
reads 274 deg.
416 You have completed the compass
adjustments on magnetic east and
magnetic south. The vessel is now steady
on magnetic north but the compass reads
004 deg. What action should be taken to
remove this error of the compass?
Use the
athwarthship
magnets and
adjust the
compass until
it reads 002
deg.
Use the
flinders bar
and adjust the
magnetic
compass until
it reads 002
deg.
Use the fore
and aft
magnets and
adjust the
magnetic
compass until
it reads 000
deg.
Use the
athwarthship
magnets and
adjust the
magnetic
compass until
it reads 000
deg.
417 You have completed the compass
adjustments on magnetic east and
magnetic south. The vessel is now steady
on magnetic west but the compass reads
266 deg. You should adjust the compass
until it reads _____ ?
268 deg. 358 deg. 002 deg. 273 deg.
418 You have completed the magnetic compass
adjustments on magnetic east and
magnetic south. The vessel is now steady
on magnetic north but the compass reads
356 deg. You should now adjust the
compass until it reads ______?
358 deg. 000 deg. 002 deg. 268 deg.
419 You have completed the magnetic compass
adjustments on magnetic east and
magnetic south. The vessel is now steady
onmagnetic north but the compass reads
356 deg. What action should be taken to
remove this error of the compass?
Use the
athwarthship
magnets and
adjust the
compass until
it reads 358
deg.
Use the fore
and aft
magnets and
adjust the
magnetic
compass until
it reads 358
deg.
Use the
athwartship
magnets and
adjust the
magnetic
compass until
it reads 000
deg.
Use the
quadrantal
spheres and
adjust the
magnetic
compass until
it reads 000
deg.
420 You have completed the magnetic compass
asjustments on magnetic east and magentic
south. The vessel is now steady on
magnetic west but the compass read 276
deg. You should now adjust the compass
until it reads ______ ?
273 deg. 270 deg. 268 deg. 358 deg.
421 You have just completed the magnetic
compass adjustment on magnetic east and
magnetic south. Your vessel is now steady
on magnetic north but the compass read
354 deg. You should now adjust the
compass until it reads ______ ?
357 deg. 358 deg. 356 deg. 000 deg.
422 You have just completed the magnetic
compass adjustments on magnetic east and
magnetic south. The vessel is now steady
on magnetic west but the compass reads
264 deg. You should now adjust the
compasss until it read ______?
267 deg. 272 deg. 268 deg. 270 deg.
423 You have just completed the magnetic
compass adjustments on magnetic east and
magnetic south. The vessel is now steady
on magnetic west but the compass reads
274 deg. You should now adjust the
compasss until it read ______?
272 deg. 273 deg. 270 deg. 268 deg.
424 You have just completed the magnetic
compass adjustments on magnetic east and
magnetic south. Your vessel is now steady
on magnetic north but the magnetic
compass reads 006 deg. You should now
adjust the compass until it read _____ ?
003 deg. 002 deg. 000 deg. 358 deg.
425 You started adjustment on the magnetic
compass on magnetic heading east and
magnetic heading south. You now come to
the next Cardinal magnetic heading west
and north removing half of the deviation.
You are now steady on intercardinal
magnetic heading nort
045 deg 047 deg 044 deg 042 deg
426 You started adjustment on the magnetic
compass on magnetic heading east and
magnetic heading south. You now come to
the next Cardinal magnetic heading west
and north removing half of the deviation.
You are now steady on intercardinal
magnetic heading nort
045 deg 043 deg 047 deg 044 deg
427 MiscQs A
chart suitable for inshore navigation, for
entering bays and harbours, would have a
scale of:
1:50,000 to
1:150,000
1:150,000 to
1:600,000
1:600,000 and
smaller
1:100,000 to
1:500,000
428 A composite great cirlce route is not as
short a distance as a great circle route, but
it is sometimes used instead. Why? It avoids high
latitudes
where ice
may be found
it is the "least
time" route
It avoids areas
of heavy
traffic
It minimize
the number of
course
changes
429 A free gyroscope is said to have "three
degrees of freedom". From those listed,
which is NOT one of these? Latitude axis Spin axis Altitude axis Azimuth Axis
430 A gyro compass on a high-speed craft often
takes time to settle correctly when altering
course. What causes this problem? The change in
the (large)
value of the
latitude
course and
speed error
when altering
course
The
acceleratios of
high speed
craft,
producing
additional
errors
The vibrations
caused by
light
displacement
ships at high
speed
The
unsteadiness
of high-speed
craft, due to
heel when
altering
course at high
speed
431 A light giving 4 flashes, which has sectors
showing two different colours, could have
an abbreviated description:Fl(4) WR 15s
15m 12.10M
Fl 15s 15m
12.10MF WR 15s 15m
F(4)WR 15s
15m 12.10M
432 A position line on a chart is defined as a
line: somewhere
on which the
observer is
situated
passing
through some
stated
position
joining any
two positions
drawn from
the ship to a
desired
destination
position
433 After all the adjustments have been made
of the sextant, any remaining error is
called: index error personal errorinstrument
error
summation
error
434 All gyro compasses, when on the eqautor,
should have:no latitude
error
a westerly
error
an easterly
error
an error
depending
upon the
course
435 Apart from ensuring navigational safety at
anchorage, what should the OOW do? Monitor the
VHF for
orders for the
vessel
Check that the
engineer on
wathc is in the
engine room
Have all
bridge
equipment
cleaned
Direct the
lookout to do
maintenance
work
436 At sunrise and sunset, the effect of
atmospheric refraction is to: reduce he
sun's
apparent
vertical
diameter
make the sun
appear to
change
altitude more
slowly
make the sun
appear
smaller
overall
reduce the
sun's
apparent
horizontal
diameter
437 At the summer solstice, the altitude of the
sun at noon to an observer at the pole
would be? 23.5° 0° 66.5° 90°
438 At the winter solstice, the sun will not rise
at all higher latitudes than: 66.5° 23.5° 72.5° 90°
439 Charted depths are always measured
below:chart datum
mean sea
level
mean low
water neaps
mean low
water springs
440 Curves on chart showing values of equal
variation are called: Isogonic Isobaric Isothermal Isopharic
441 Damping in azimuth in a gyro compass
produces: a setting
position
exactly on the
meridian
an error which
varies with
latitude
an error which
is constant
an error which
varies
longtitude
442 Damping in tilt in a gyro compass produces:
an error
which varies
with latitude
a setting
position
exactly on the
meridian
an error which
is constant
an error which
varies with
longtitude
443 Distance on a chart is measured using:
latitude saclelongtitude
scale
any uniform
scale
none of the
given options
444 Fiber-optic compasses have advantages
over conventional gyro compasses. From
those listed, which is NOT one of those
advantages?
They are
more
accurate
They have a
very short
setting time
They have low
maintenance
and high
reliability
They can be
used in high
latitudes an at
high speeds.
445 For a circumpolar star, which from those
listed is NOT true?
The LHA of
the star will
always be less
than 90°
The
declination
and latitude
of the
observer must
be the same
name ( both
north or both
south
The polar
distancce of
the star must
be less than
the observer;s
latitude
The star
above thew
horizon for 24
hours of the
day
446 Free gyroscopes are turned into gyro
compasses by utilizing:gravity
the spin of the
earth
the torque of
the wheel
the rate of
spin of the
wheel
447 From those listed which should be the
preferred method position fixing for
greatest accuracy and certainly of position?taking a radar
and visual
bearing
taking several
radar bearings
taking a radar
range and
radar bearing
taking several
radar ranges
448 From those listed, the best and target to
use for a radar bearing is: an isolated
feature
a large
headland
a sloping
foreshore
a coastal
indentation
449 From those listed, the best and target to
use for radar ranging is a:cliff face small rok
low- lying
point
target such as
a lighthouse
450 From those listed, which are " soft iron"
corrector?The spheres
The fore and
aft correctors
The
athwartship
corrector
the heeling
error
correctors
451 From those listed, which is NOT a reason
for having the standard magnetic compass
high up and on the certerline in the ship? In order to
reduce the
chance of
damage
To enable an
all round view
of the horizon
for takinhg
bearings
to keep it
away from
most other
sources of
magnetism
So that
induced
magnetism is
balanced as
evenly as
possible
452 From those listed, which is NOT a way of
destroying magnetism? Placing
another
magnet next
to it with
unlike poles
together
Heating the
magnet
Subjecting the
magnet to
violent shocks
Applying
alternating
current to the
magnet
453 From those listed , which of the statement
about magnetic variation is TRUE?
The value of
variation at a
place changes
slowly
The value of
variation
varies
accoreding to
the magnetic
influences of
the ships
The value of
variation at a
particular
place is
always the
same
The value of
variation is
due to the
combinfed
influenced of
the ships andn
the earthy
454 From those listed, which of the statement
about the dip of a magnet is TRUE? At the
magnetic
equator, the
dip is zero
and the
directive
force
greatest
At the
magnetic
equator, the
dip is
maximum and
the directive
force the least
At the
magnetic
poles , the dip
is least and
the directive
force is the
greatest
At the
magnetic
poles, the dip
is least and
the directive
force is
reduced
455 From those listed, which of the statement
about the poles of a magnet is TRUE?The red pole
will attract a
blue pole and
is the north
seeking end
The red pole
will attract a
blue pole and
is the south
seeking end.
The red pole
will repel a
blue and is
the north
seeking end
The red pole
will repel a
blue and is
the south
seeking end
456 From those lited, which would be the
preferred method of position fixing for
greatest accuracy and certainty of position?Taking a radar
range and
visual bearing
Taking
several radar
bearings
Taking a radar
range and
radar bearing
taking several
radar rangres
457 Gaussin error of the magnetic compass is
caused by:
the ships
being on the
same heading
for a long
period
the ship
swinging
quickly from
one course to
another
external
magnetic
influences,
such as from
magnetic
mines
internal
magnetic
influences,
such as
electrical
equipment
near the
compass
458 Gaussin or Retentive error:
is uncertain
in size and
may take
several hours
to clear
can only be
approximately
calculated by
undertaking a
swing of the
compass
is uncertain in
size, but only
affects the
compass for a
very short
period
can be
calculated and
allowed for
when
settimng
courses
459 Great circles appear as straight lines on:
gnomonic
charts
orthomorphic
charts
transverse
mercator
charts
marcator
charts
460 Heeling error is at its maximum when the
course are:north or
southeast or west
NE,SE,WE,or
NW
any course -
effects are
independent
of the course
461 How are secondary port chosen to be
linked with a particular standard port?The standard
port is is the
nearest one
with similar
tidal
characteristic
s
The standard
port is the
nearest one to
the secondary
port
The times of
high and low
water are very
close for he
standard and
secondary
ports
The heights of
high and low
water are very
close for the
satndard and
secondary
ports
462 How does a current flowing in the same
direction as the wind affect the sea wave
length and height? It increases
ave length
and decreases
wave height
It decreases
wave length
and wave
height
It increases
wave length
and height
It decreases
wave length
and increases
wave height
463 How is a ship's permanent magnetism
acquired during building?By the
hammering
and heating
processes
while heading
in the same
direction in
the building
the yard
By the
intersection of
permanent
magnets into
the structure,
to offset the
inducing
forces
By the sum of
all the
magnetic
forces of the
individual
components
By the
designers who
ensure that
the magnetic
effects are
within limits
imposed
under the
class of the
ship
464 How is distance measured on a Mercator
chart?
On the
latitude scale
On the scale
of meridional
parts
On the scale
drawing at the
bottom of t he
chart
On the
longtitude
scale
465 How many degrees are there in each point
of the compass? 11.25 15 17.5 12
466 How often are chart correction published?
Weekly Monthly Yearly Annualy
467 How often is a chart catalogue published?
Annualy Monthly Twice a year Weekly
468 How often should a position fix be taken
during a sea voyage if the ship is in open
coastal waters?Atleast every
30 minutesTwice a watch
Just before
the change of
watch
Only when the
visibility drops
469 How often should the auto pilot be tested
in manual mode?At least once
a watch
At least once
a day
At least once
in a passage
Prior to arrival
and departure
only
470 How often should the magnetic compass
error be checked? Once a watch
and after a
major course
alteration
Once a day Twice a day
After each
major
alteration of
course
471 How should tidal predictions be made for
stretches of coastline between Secondary
Ports?
By using a co -
tidal line
chart
By using the
nearest port
prediction
By
interpolating
between the
predictions
for the
nearest ports
on either side
Such
predictions
should not be
made
472 If a ship has a permanent magnetism with
a blue pole forward, the deviation caused
will be;zero on north
and south,
east on
easterly, west
on westerly
courses
zero on north
and south,
west on
easterly, east
on westerl
courses
zero on east
and west,
west on
northerly,east
on southerly
courses
zero on east
and west, east
on northerly,
west on
southerly
courses
473 If a ship has permanent magnetism with a
blue pole to port, the deviation caused will
be:zero on east
and west,
west on
northerly,east
on southerly
courses
zero on north
and south,
east on
easterly,west
on westerly
courses
zero on north
and south,
west on
easterly,east
on westerly
courses
zero on east
and west, east
on
northerly,wes
t on southerly
courses
474 If a ship has permanent magnetism wit a
red pole forward, the deviation caused will
be: zero on north
and
south,west on
easterly,east
on westerly
courses
zero on north
and
south,east on
easterly,west
on westerly
courses
zero on east
and west,
west on
northerly,east
on southerly
courses
zero on east
and west,east
on
northerly,wes
t on southerly
courses
475 If a ship is built a yard while heading
south,the poles of permanent magnetism
will be:
blue to the
bow and red
to the stern
red to the
bow and red
to the stern
if built in the
northen
hemisphere,re
d to the
blow,but built
in the
southern
hemisphere
blue to the
bow
if built in the
northern
hemisphere,
blue to bow,
but built in
the southern
hemisphere
red to the
bow
476 If a ship is built in a yard while heading
east, the poles of permanent magnetism
will be:
red to port
and blue to
starboard
if built in the
northern
hemisphere,re
d to port,if
built in the
southern
hemisphere
blue to port
blue port and
red to
starboard
if built the
northern
hemisphere,bl
ue to port,if
built in the
southern
hemisphere
red to port
477 If a ship is built in a yard while heading
north , the poles of permanent magnetism
will be:
red to the
bow and blue
to the stern
if built the
northern
hemisphere,re
d to the
bow,if built in
southern
hemisphere
blue to the
bow
blue to the
bow and red
to the stern
if built in the
northern
hemisphere,bl
ue to the
bow,if built in
the southern
hemisphere
red to the
bow
478 If a star has a northerly declination and the
observer is in north latitude,which of the
statements listed is TRUE?The star will
be above the
horizon for
more than 12
hours
The star must
be
circumpolar
The star will
be above the
horizon for
less than 12
hours
The bearing of
the star must
be south
when on the
meridian
479 If the axis of a free gyroscope in a north
latitude is horizontal and pointed to the
east of north of the meridian,it will:dry east and
tilt up
drift west and
tilt up
drift east and
tilt down
drift west and
tilt down
480 If the axis of a free gyroscope on the
equator is horizontal,the northerly end of
the spin axis will:
tilt up if to
the east of
the meidian
drift west and
tilt up
tilt up if to the
west of the
meridian
drift east and
tilt up
481 If the OOW is in doubt as to the Pilot's
actions or Intentions,what must he do? Seek
clarification
from the
Pilot, notify
the master
and take
corrective
action
Avoid taking
any action
Ask the pilot
to leave the
bridge
Call the
master and
wait for him
to take action
482 If the trace is not correctly centered,error
may occur when: measuring
bearings
using the gain
control
measuring
ranges
using the
tuning control
483 If the true transit bearing of two leading
lights is red off the chart and the compass
bearing of the two lights, when in transit,is
taken,then the difference between the two
bearings so obtained is the:compas error deviation Variation
magnetic
bearing
484 In an echo sounder, what converts the
electrical signal into sound? The
transducer
The signal
generator
The
modulatorThe amplifier
485 In what direction does the axis of the gyro-
compass wheel point? True NorthMagnetic
NorthNorth relative Compas North
486 In which publication can information on
ship reporting be found? ALRS Ship Routeing IAMSARSOPEP
Manual
487 In which publication can information on
VTS be found?ALRS Tides tables
Routeing
charts
Chart
Catalogues
488 Incoming target echoes are detected by
the:mixer cyrstal
video
amplifierI.F amplifier
Local
oscillator
489 Latitude on the terrestrial sphere is
comparable with what on the celestial
sphere? DeclinationCelestial
meridianAltitude
Celestial hour
circle
490 Latitude,course and speed error of a gyro
compass:applies to all
gyro
compasses
applies only to
gyros which
are damped in
azimuth
does not
occur in a
properly set
up gyro
compass
applies only to
gyros which
are damped in
tilt
491 Magnetic compass deviation changes with:
heading draught speed longtitude
492 Magnetic variation changes its value with:
the vessel's
position on
the earth
the location of
the compass
within the
vessel
the change in
direction of
the vessel's
heading
the vessel's
trim or heel
493 Marine radar wavelenghts are measured in:
centimetersfleet per
secondsmicroseconds megahertz
494 Most commonly,ship's radar operates in
the: X- BAND L - BAND S-BAND Q-BAND
495 On the chart, to find the course to steer to
make a good a course, allowing for current
and leeway , the current and leeway would
be applied:
current first,
at the start of
the run and
then leeway
leeway first,at
the start of
the run, and
thenthe
current
Current and
then leeway ,
at the end of
the run
leeway, and
then current
at the end o f
the run
496 Over what length of time a diesel powered
vessel should be slowed down from full sea -
speed to maneuvering speed? 1 hour 20 minutes 10 minutes 4 hours
497 Precession in relation to a free gycroscope
is:the change of
dirction of the
spin axis
when a force
is applies at
right angles to
the axis
the rate of
change of
direction of
the spin axis
due to the
rotation of the
earth
the rate of
change of
direction and
tilt of the spin
axis due to
the rotation
of the earth
the change of
direction of
the spin axis
when a force
is applied in
the direction
of the axis
498 Radar does not transmit continuously
because it would: prevent
detection of
targets
cause
interference
to other
vessels
reduce the life
of
components
make the
equipment
get very hot
499 Radio signals travel a approximately a
speed of: 300 milion
meters per
second
30 million
meters per
second
3 million
meters per
second
3000 milion
meters per
second
500 Secondary Ports associated with Standard
Ports are classed in that way because: the tidal
curves are
similar
the high and
low water
heights are
similar
they are
secondary in
importance
the high and
low water
times coincide
501 Should the OOW, who is escorting the pilot
to the pilot ladder, be equipped with a
walkie-talkie for communication with the
bridge?Always
Yes, but only
if visibilty is
restricted
Its up to the
pilot to decide
Its not
necessary
502 Sidereal hour angle is defined as the
angular distance of an hour circle: West of the
First Point of
Aries
West of the
observer's
meridian
West of the
prime(Greenw
ich) meridian
East of a
reference
hour circle
503 Sounds waves will travel through:
gases, liquids
and solids
gases and
liquids only
a vacuum,
gases,liquids
and solids
a
vacuum,liquid
s and solids
504 Spring tides normally occur:
about every
two weeks
about every
seven days
about every
three weeks
about every
four weeks
505 Stars tabulated in the nautical almanac
which have a negative magnitude (e.g. -
1.4)? Are very
bright
Are only
visible in the
southern
hemisphere
Should only
be used for
navigation
exceptional
circumtances
Are only
visible with
the aid of the
sextant
telescope
506 The " equation" of time" is
the interval
between
apparent time
and mean
time
the formula
detremining
local time
from
Greenwich
time
the formula
for calculating
the time of
noon
the difference
a lunar day
and a solar
507 The " magnetic variation" is the angle
between:
the
geographic
and magnetic
meridians
the
geographic
meridian and
compass
north
the magnetic
meridian and
compass
north
the vessel's
head by gyro
and the
vessel's head
by standard
compass
508 The angle between the magnetic north and
the true north is :Variation deviation compass error
magnetic
compass error
509 The axis of a free gyroscope is pointed at a
star. From those listed, which is not
correct?The axis
cannot be
distributed
from this
direction
while the rate
of spin is
maintained
The axis will
circle the
celestial poles
once in
23h56m
approximately
The axis will
stay pointing
at the star
The axis will
circle the
north celestial
pole in an anti-
clockwise
direction
510 The chart abbreviation "Al Fl WR 60 secs"
indicates:
a white flash
followed
immediately
by a red flash
every 60
seconds
a white flash
every 60
seconds
followed by a
red flash 60
seconds later
a white flash
every 30
seconds
followed by a
red flash 30
seconds later
a white flash
followed
immediately
by a red flash
every 60
seconds then
a red flash
followed
immediately
by a white
flash every 60
seconds
511 The commonest use of the ABC tables is to
find the azimuth of a celestial body. These
tables can also be used to:
find the initial
course in a
great circle
sailing
calculation
pre-compute
true altitudes
determine
course and
distance run
solve
terrestrial
triangles for
plane sailing
calculations
512 The declination of a celestial body is the:
arc of the
celestial
meridian
between the
equinoctial
and the
parallel of
declination
passing
through the
body
angle,
measured at
the center of
the earth,
between body
and the
ecliptic
angle,
measured at
the center of
the earth,
between the
observer and
the body
arc of the
celestial
meridian
between the
ecliptic and
the parallel of
declination
passing
through the
body
513 The deviation of a compass produced by a
disturbing magnet varies:inversely with
the cube of
the distance
from the
magnet
inversely with
the square of
the distance
from the
magnet
directly with
the distance
from the
magnet
inversely with
the distance
from the
magnet
514 The earth is said to be in "aphelion" on
approximately: 4th July 21st January 21st June 1st January
515 The earth is said to be in "perihelion" on
approximately: 1st January 21st January 21st June 4th July
516 The effect of gravity control makes the axis
of the gyroscope: move anti-
clockwise
around a
central
position in an
ellipse
move
clockwise
around a
central
position in an
ellipse
move anti-
clockwise
around a
central
position in a
circle
move
clockwise
around a
central
position in an
ellipse
517 The first point of Aries is the point on the
celestial sphere where: the ecliptic
cuts the
equinoctial on
the sun's
apparent path
from south to
north
the sun
crosses the
equinoctial
when going
from north to
south
the sun
crosses the
ecliptic when
going from
south to north
the prime
meridian cuts
the
equinoctial
518 The free gyroscope are turned into gyro
compasses by utilizing:gravity
the spin of the
earth
the torque of
the wheel
the rate of
spin of the
wheel
519 The frequency of a radio wave is:
the number if
wavelengths
which pass a
given point in
one second
the speed
which a radio
wave passes a
given point
the distance
from the crest
one wave to
the next crest
the number of
meter of
wavelength
per second
520 The GPS system uses satellites which:
circle on earth
approximatel
y twice each
day in a
precise orbit
are on polar
orbits,
separated by
longitude
are on orbits
parallel to the
equator and
distributed to
near the poles
are
geostationary,
but
distributed
around the
earth
521 The GPS system uses:UHF radio
signals
MF radio
signals
HF radio
signals
LF radio
signals
522 The horizontal distance between the
adjacent crest of a radio wave is called: the
wavelengththe amplitude a cycle the frequency
523 The intensity of the election beam in the
C.R.T. is controlled by:varying the
potential on
the grid
passing a
current
through the
deflection coil
a signal from
the time unit
the action of
the first
anode
524 The intermediate frequency is generated by
the: mixer crystal magnetronselsyn
generatorlocal oscillator
525 The magnetic equator is:
the line
joining places
where the dip
is zero
parallel to the
earth's
equator, but
moves north
and south
with the
seasons
coincident
with the
earth's
equator
the line
joining places
where the
directive force
is least
526 The magnetic force exerted at any point in
the magnetic field varies:inversely with
the square of
the distance
from the
magnet
inversely with
the distance
from the
magnet
directly with
the distance
from the
magnet
inversely with
the cube of
the distance
from the
magnet
527 The magnitude of a star is a measure of its:Relative
brightness
Absolute
brightnessDiameter
Semi-
diameter
528 The magnitude of a star which can only just
be seen with the naked eye on a clear, dark
night is:6th
magnitude
3rd
magnitude
4th
magnitude1st magnitude
529 The main source of error in a GPS position
would be from: Satellite clock
errorReceiver error
Relatively
error
There is no
error with GPS
530 The moon rotates around the earth
approximately: 28 days 7 days 1 day 1 year
531 The moon spins on its axis approximately
every: 28 days 7 days 1 day 1 year
532 The most appropriate chart for navigating
when approaching a harbour is: a large scale
chart
a small scale
chart
a harbour
plan
a gnomonic
chart
533 The path of the moon's rotation around the
earth, relative to the plane of the earth
rotation the sun is:at an angle of
5°at right angles Parallel
at an angle of
23.5°
534 The path of the earth's rotation around the
sun, relative to the plane of the equator is: at an angle of
23.5°at right angles
at an angle of
5°Parallel
535 The period of a semi-diurnal tide is
approximately: half a lunar
day
half a sidereal
daya lunar day
half a solar
day
536 The plane of the index mirror of the sextant
is at an angle of 20° to the plane of the
horizon mirror. What is the reading on the
arc?40° 80° 20° 60°
537 The point at which the helm must be
applies to achieve a required course
alteration is called the:wheel-over
positionway-point abort-point drift-point
538 The principle of a fiber-optic "gyro"
compass relies on: three fiber-
optic rings,
mounted on a
platform,
which sense
the rotations
of the
platform due
to ship and
earth
movement
a fiber-optic
aerial, which
detects signals
from a
satellite and
computes the
direction of
north
two fiber-
optic sensors,
which
measure the
accelerations
of the ships
and compass
these to the
movement of
the earth
a spinning
fiber-optic
wheel, which
operates like a
conventional
gyro, but is
much lighter
539 The process of turning a gravity controlled
gryroscope into a compass is called:damping torque tilting precession
540 The relationship between the distance on
the earth and the length by which that
distance is shown on the navigational chart
is called the:natural scale actual scale
calculated
scalevariable scale
541 The ship's magnetic compass should be
adjusted following certain circumstances.
From those listed, which is NOT one of
those circumstances? When a new
Master joins
the ship
When major
structural
repairs have
been carried
out
When
electrical
equipment is
installed in
the vicinity of
the compass
When it
appears
unreliable
542 The ship's magnetic compass should be
especially checked for error following
certain circumstances. From those listed,
which is not one of those circumstances?
If the ship has
visited an
areas with a
large value of
variation
After using
electromagne
tic lifting
appliances to
load or
discharge
After using
cargoes with
magnetic
properties
If the ship has
been laid up
for a period
543 The shortest distance between two points
on the earth's surface is: An arc of a
great circleA loxodrome
An arc of a
small circle
a para-angular
course
544 The sidereal hour angle of a celestial body
is the:arc of the
equinoctial
(measured
westwards
from the first
point of Aries)
to the
celestial
meridian
through the
body
act of the
equinoctial
(measured
eastwards
from the first
point of Aries)
to the
celestial
meridian
through the
body
angle at the
celestial pole
between the
meridian
through
Greenwich
and the
meridian
through the
body
(measured
westwards)
Angle at the
celestial pole
between the
meridian
through
Greenwhich
and the
meridian
through the
body
(measured
eastwards)
545 The summer solstice in the northern
hemisphere is approximately on: 21st June 1st June 1st July 21st July
546 The summer solstice in the southern
hemisphere is approximately on: 21st
December21st January 1st December 1st January
547 The sun is at the first point of Aries on the
celestial sphere at approximately: 21st March 21st June21st
September
21st
December
548 The times of sunrise and sunset are
tabulated in the Nautical Almanac. These
times are:The LMT
when the
upper limb is
on the visible
horizon for an
observer at
sea level
The LAT when
the upper
limb is on the
visible horizon
for an
observer at
sea level
The LMT
when the
lower limb is
on the visible
horizon for an
observer at
sea level
The LAT when
the lower limb
is on the
visible horizon
for an
observer at
sea level
549 The two unique properties of a free
gyroscope are: precession
and
gyroscopic
inertia
torque and
rigidity in
space
gyroscopic
inertia and
spin
spin and
precession
550 The unit which sends returning target
echoes to the receiver is the: scanner unitpower supply
unit
transmitter
unitdisplay unit
551 The value of the "equation of time" is:
between zero
and about 17
minutes
between zero
and about 30
minutes
dependent
upon the
observer's
longitude
dependent
upon the
observer's
latitude
552 The vertex of a great circle is the point at
which it: comes
nearest to the
pole
passes
through the
Greenwhich
meridian
cuts the
equator
runs
north/south
553 The vertical force of the earth's magnetism:
does not
cause
deviation of
the magnetic
compass
influences the
values of
variation
causes
deviation of
the magnetic
compass
can be used to
calculate the
value of
variation
554 The vessel is on a steady bearing and the
range is reducing. What action would you
take?sound two
short blasts
and alter
course to port
sound one
short blast
and alter
course to
starboard
make a
substantial
reduction of
speed
sound five
short and
rapid blasts
and stand on
with caution
555 To an observer at the south pole, at the
beginning of September:
there will be
twilight
throughout
the day
there will be a
period of
twilight for a
few hours
only around
noon
the sun will be
above the
horizon
throughout
the day
the sun will
rise for a short
period around
noon
556 To convert a compass course to a magnetic
course, it is necessary to apply:deviation variation compass error
none of the
other
557 To convert a magnetic course to a true
course, it is necessary to apply:variation deviation compass error
none of the
other
558 Under soundings marked on the chart, the
nature of the sea bottom is also indicated.
What does SH indicate? Shells Corals Soft mud Shingle
559 Variation values change for a particular
place because:
the magnetic
poles are
moving their
positions in
relation to
the
geographic
poles
the angle
between the
magnetic
meridian and
the meridian
at the place
varies
according to
the heading of
the ship
ionospheric
changes cause
the magnetic
poles to move
in a random
fashion
the magnetic
poles are not
in the same
positions as
the
geographic
poles
560 What are sailing directions also known as?
Pilot booksGuide to port
entry
Routeing
charts
Passage
planning
charts
561 What chart should be used when
navigating? The largest
scale chart
onboard for
the area
which is
properly
corrected
Any chart
which shows
the area
which the
vessel is
passing
through
The largest
scale chart on
board for the
concerned
area
The chart
which covers
the largest
part of the
passage
562 What charts are used for coasting, pilotage
waters and plotting waypoints? Large scale Small scale Routeing Instructional
563 What charts are used for plotting Great
Circle course?Gnomonic Instructional Routeing
Passage
planning
564 What do you call the error in the observed
altitude of the sun, which results from the
observer being on the surface of the earth
not at its center?Parallax
Semi-
diameterDip Refraction
565 What is "side error" on a marine sextant?
When the
horizon
glass/mirror
is not
perpendicular
to the plane
of the sextant
When the
telescope
collar is not
perpendicular
to the plane
of the sextant
When the
index mirror is
not
perpendicular
to the plane
of the sextant
When the
index mirror
and the
horizon
glass/minor
are not
parallel at all
times
566 What is mean by "retentive magnetism"
with regard to a ship's magnetic compass?
The ship
retains
induced
magnetism if
the ship has
been heading
in the same
direction for a
considerable
period
The compass
needle retains
induced
magnetism if
the ship has
been heading
in the same
direction for a
considerable
period
The compass
retains a
"magnetic
memory" of
the previous
course when
the ship
changes to a
new one
The correctors
retain
magnetism
from
magnetic
objects placed
near to the
compass
567 What is the "error or collimation" on a
marine sextant?When the
telescope is
not parallel to
the plane of
the sextant
When the
telescope
and/or
mirrors causes
distortion
When the arc
has been
incorrectly
graduated or
has been
damaged
When the
vernier or
micrometer
scals are
incorrect
568 What is the "error of perpendicularity" on a
marine sextant?When the
index mirror
is not
perpendicular
to the plane
of the sextant
When the
telescope
collars is not
perpendicular
to the plane
of the sextant
When the
index mirror
and the
horizon
glass/minor
are not
parallel at all
times
When the
horizon
glass/mirror is
not
perpendicular
to the plane
of the sextant
569 What is the angle between the ecliptic and
equinoctial? 23.5° 0° 66.5° 90°
570 What is the definition of the "geographic
range" of a light?The maximum
distance at
which a light
may be seen,
limited only
by the
curvature of
the earth, in
perfect
visibility
The maximum
distance at
which a light
may be seen
under existing
visibility
conditions
The maximum
distance at
which an
observer at
sea level can
observe a
light under
standard
meteorologica
l conditions
The maximum
distance at
which a light
may be seen,
limited only
by its
candlepower
571 What is the definition of the "luminous
range" of a light?
The maximum
distance at
which a light
may be seen,
under
prevailing
meteorologic
al conditions
The maximum
distance at
which a light
may be seen
in clear
weather
The maximum
theoretical
range of
visibility of a
light
The maximum
distance at
which an
observer at
sea level can
observe the
light standard
meteorologica
l conditions
572 What is the definition of the "nominal"
range of a light?
the maximum
distance at
which a light
may be seen
in clear
weather
the maximum
theoretical
range of
visibility of a
light
determined
from the
heights of
observer and
the light
the maximum
distance at
which a light
may be seen,
under
prevailing
meteorologica
l conditions
the maximum
distance at
which an
observer at
sea level can
observe the
light under
limited
meteorologica
l conditions
573 What is the east-west distance between
two points called? Departure D'long D'lat DMP
574 What is the line roughly following the
180th meridian called?The date line
The
Greenwich
meridian
The equator A rhumb line
575 What is the main advantage of a liquid
compass over a dry card compass?
it is steadier
than a dry
card compass
it is more
easily
adjusted than
a dry card
compass
it has a slower
period of
oscillation
than a dry
card compass
it is more
accurate than
a dry card
compass
576 What is the main purpose of frequently
recording deviation of the ship's magnetic
compass in a log or compass deviation
book?
To enable
unforeseen
changes to
deviation to
be quickly
detected
To provide
evidence in
the event of a
collision,
grounding or
other such
incident
To provide for
accurate
planning of
courses in
passage plans
To enable the
compass
adjusted to
calculate the
sizes and
locations of
the correctors
577 What is the meaning of the symbol CL on a
navigational chart? Clay Coral Cloud Cill
578 What is the usual datum for a port or area
from which predicted tidal heights are
calculated?The lowest
astronomical
tide level
The mean low
water springs
level
The average
low water
level in that
locality
The lowest
recorded
water level in
that locality
579 What is the vertical distance on a given day
between the water surface at high and low
water called? Range of tides Height of tide
Highest
astronomical
tide
Lowest
astronomical
tide
580 What is true of the tide at an amphidromic
point? The-tidal
range is zero
Only spring
tides occur
Co-range lines
converge
The tidal
range is
maximum
581 What would you adjust in an attempt to
eliminate index error of a sextant? The horizon
glassThe telescope
The tangent
screwcalibration
582 What would you say about a ship which is
course unstable? When you
apply rudder,
she will
continue to
turn long
after the
rudder is
returned to
amidships
She will
receive large
rudder angles
to maintain
course
When you put
rudder
amidships,
she will
quickly return
to straight
course
When you
apply rudder,
she will take
time before
answering
583 When a force is applied at right angles to
the spin axis of free gyroscope, the axis
moves:at 90° to the
torque in the
direction of
the spin
at 180° to the
torque in the
opposite
direction to
the spin
at 90° to the
torque in the
opposite
direction to
the spin
at 90° to the
torque in the
direction of
the spin
584 When soft iron is induced by the earth's
magnetism:there is said
to be a red
pole at the
end directed
towards the
north
There are no
poles to
consider as
the
magnetism
dies when the
induction
ceases
there is said
to be a blue
pole at the
end directed
towards the
north
the poles are
said to be
distributed
throughout
the iron
585 When the index mirror and the horizon
mirror of the sextant are parallel, the
sextant should read: 0° 60° 90° 120°
586 When the moon is in opposition, the tide is:
a spring tide a neap tide a flood tide an ebb tide
587 When the moon is in quadrature, the tide
is: a neap tide a spring tide an ebb tide a flood tide
588 When the sun and moon are in near
conjunction or opposition the tides are
called: spring diurnal neap full
589 When tides are classes as being diurnal,
there will be: one high
water and
one low
water each
tidal day
two high
water and two
low waters
each tiday day
two high
waters and
one low water
each tidal day
one high
water and two
low waters
each tidal day
590 When using a buoy as an aid to navigation,
which of the following should always be
considered?
The buoy may
not be in its
charted
position
If the light is
showing its
correct
characteristic
it is its right
position
If no radio
navigation
warming has
been issued
concerning
the buoy, it
can be
assumed to be
in its correct
position
The buoy is
nearly always
well anchored
and can be
considered to
be in its
charted
position
591 When using great circle sailing the saving in
distance is the most when: the course is E-
W, nearer to
the poles
at the equatorthe course is
N-S
the course is
one of the
inter-cardinal
headings
592 A ship steers the following courses and
distances: 080°T for 42 miles; 201°T for 36
miles 145°T for 27 miles; 045°T for 45
miles Calculate (using plane sailing) the
course and distance made:
099°T 81
miles081°T 81 miles
099°T 150
miles
009°T 150
miles
593 A ship steers the following courses and
distances: 180°T for 22 miles; 290°T
for 73 miles 159°T for
68 miles; 270°T for 16 miles
Calculate (using plane sailing) the course
and distance made:
225°T 85
miles
225°T 179
miles315°T 85 miles
315°T 179
miles
594 A vessel in initial position 60°00; 04°00' E
steam due west for 240 miles. Calculate the
new longtitude to the nearest minute. 4°00'W 8°00'W 2°00'E 12°00'W
595 A vessel in latitudes 54°23'S longtitude
16°18'E steams on a course of 270°T until
in longtitude 8°43'W. How far as she
steamed to ty nearest mile?874 miles 472 miles 435 miles 913 miles
596 Given that the true altitude is 46°20.2'
calculate the True Zenith Distance 43°39.8' 72°16.0' 34°06.4' 46°20.2'
597 Given that true altitude is 57°24.9' calculate
the True Zenith Distance: 32°35.1' 57°24.9' 46°20.2' 55°53.6'
598 Given that true altitude is 61°47.9' calculate
the True Zenith Distance: 28°12.1' 46°20.2' 43°39.8' 32°35.1'
599 Given that the True Zenith Distance is
17°44.0' and the Calculated Zenith Distance
is 17°46.0' find and name the intercept ,
with respect to the direction of the
observed body:
2.8 Towards 4.0' away 2.0' away 4.0' Towards
600 Given the True Zenith Distance is 36°22.0
and that Calculated Zenith Distance is
36°24.8 find and name the intercept,with
respect to the direction of the observed
body.
2.8' Towards 4.0' away 2.8' away 4.0'Towards
601 Given that the True Zenith Distance is 64
°44.0' and that the Calculated Zenith
Distance is 64°53.0', find and name the
intercept, with respect to the direction of
the observed body
9.0' Towards 11.0' away 2.8' Towards 9.0' away
602 If a ship is in 150°E longtitude and the
equation of time is +6 minutes,what is the
GMT of noon at the ship? 0206 0154 2154 2205
603 If a ship is in 30°W longtitude and the
equation of times is -4 minutes,what is the
GMT of noon at the ship? 1356 1004 0956 1404
604 If a ship is in 90°E longtitude at the
equation of time is -4 minutes, what is the
GMT of noon at the ship? 0556 0604 1756 1804
605 If the distance between two consecutive
isobars (drawn at intervals of 4mb) is
found to be in 100 n.miles and the latitude
is 50 deg, what is the geostrophic wind
speed?
30 kts 15 kts 60 kts 120 kts
606 If the GHA of the sun is 173° and LHA IS
358°,what is the longtitude? 175°W 5°W 175°E 5°E
607 If the GHA of the sun is 315° and the LHA
is 36°,what is the longtitude? 81°E 59°W 9°E 121°W
608 Leading lights are in line bearing 126°T. If
the gyro error is 2°low, what would the
gyro bearing of the leading lights be? 124° 126° 128°
It depend
upon the
heading of the
ship
609 Steaming South at 10 knots, you estimate
the wind speed from the surface as 15
knots. Smoke from the funnel is going away
to port directly to abeam. What is the
approximate true direction of the wind?WNW NNW SSW WSW
610 The best position fix is obtained when the
bearings of two objects are: 90 degrees
apart
45 degrees
apart
180 degrees
apart
135 degrees
apart
611 The gyro course is 165° and the gyro error
is 3° low. What is the true course?
168° 165° 162°
It could be
any of the
other options
612 The gyro course is 332° and the gyro error
is 2° high. What is the true course?
330° 332° 334°
It could be
any of the
other options
613 The index error of a marine sextant read as
48° 25'.3 is known to be 5' on the arc. Find
the observed altitude. 48° 20.3' 48° 30.3' 48° 25.3' 48° 35.3'
614 The index error of a marine sextant reads
as 35° 25'.3 is known to be 2' off the arc.
Find the observed altitude. 35° 27.3 35° 25.3 35° 23.3' 35° 29.3'
615 The true altitude of Arcturus is 42° 28'.4.
Find the true zenith distance. 47° 31.6' 57° 31.6' 47° 36.1' 46° 31.6'
616 The true altitude of Canopus is 64° 52'.4.
Find the true zenith distance. 25° 07.6' 15° 07.6' 25° 06.7' 15° 06.7'
617 The true altitude of the suns lower limb is
74° 45'.4. Find the true zenith distance.15° 14.6' 16° 14.6' 25° 14.6' 14° 14.6'
618 The true zenith distance of the sun when
on the observer's meridian bearing North is
46° 23.9' and the declination is 9° 15'.0 S.
Calculate the observer's latitude. 55° 38.9' S 37° 0.80' S 37° 08.9' N 64° 23.2' S
619 The true zenith distance of the sun when
on the observer's meridian bearing North is
6° 57.4' and the declination is 21° 28'.4 S.
Calculate the observer's latitude. 28° 25.8' S 14° 31.0' N 28° 25.8' N 14° 31.0' S
620 The true zenith distance of the sun when
on the observer's meridian bearing South is
6° 57.4' and the declination is 14° 36.2' S.
Calculate the observer's latitude. 07° 33.8' S 21° 33.6' N 07° 38.8' N 21° 33.6' S
621 The correction of atmospheric refraction as
applied to the observed altitude of a body:
decreases
with altitude
depends only
a atmospheric
conditions
and is
independent
of altitude
increases with
altitude
is negligible
and can be
ignored
622 The true zenith distance of the sun when
on the observer's meridian bearing South is
15° 23.6' and the declination is 22° 19.5' N.
Calculate the observer's latitude.37° 43.1' N 6° 55.9' S 17° 43.1' N 6° 55.9' N
623 The true zenith distance of the sun when
on the observer's meridian bearing South is
15° and the declination is 22° N. Calculate
the observer's latitude.37° N 37° S 7° S 7° N
624 The true zenith distance of the sun when
on the observer's meridian bearing North is
6° and the declination is 16° N. Calculate
the observer's latitude.10° N 10° S 22° N 22° S
625 The true zenith distance of the sun when
on the observer's meridian bearing North is
39° 14.3' and the declination is 17° 22'.1.
Calculate the observer's latitude.21° 52.2' S 24° 52.2' S 56° 36.4' N 56° 36.4' S
626 The true zenith distance of the sun when
on the observer's meridian bearing North is
6° 57.4' and the declination is 16° 25.4' N.
Calculate the observer's latitude.09° 28.0' N 09° 28.0' S 23° 22.8' N 23° 22.8' S
627 The true zenith distance of the sun when
on the observer's meridian bearing South is
31° 30' and the declination is 16° 25.4' N.
Calculate the observer's latitude.47° 55.4' S 16° 25.4' N 15° 04.6' S 15° 04.6' N
628 The true zenith distance of the Sun when
on the observer's meridian bearing South is
54° 28.6' and the declination is 4° 28.4' S.
Calculate the observer's latitude.50° 00.2' N 58° 57.0' N 50° 00.0' N 58° 28.6' N
629 The true zenith distance of the sun when
on the observer's meridian bearing North is
6° and the declination is 21° S. Calculate
the observer's latitude.27° S 15° N 27° N 15° S
630 The true zenith distance of the sun when
the observer's meridian bearing South is
54° and the declination is 4° S. Calculate
the observer's latitude.50° N 58° N 50° S 58° S
631 To an observer in longitude 164° E, the LHA
of the sun is 26°. What is the GHA of the
sun? 222° 170° 190° 138°
632 To an observer in longitude 172° E, the LHA
of a star is 315°. If the SHA of the star is
036°, what is the GHA of Aries? 107° 091° 127° 143°
633 To an observer in longitude 65° W, the LHA
of a star is 48°. If the SHA of the star is
217°, what is the GHA of Aries? 256° 160° 104° 304°
634 To an observer in longitude 75° W, the LHA
of the sun is 327°. What is the GHA of the
sun? 042° 108° 252° 318°
635 A vessel is under pilotage approaching a
European port. Who is responsible for the
safe navigation of the vessel?
The master
and duty
officers
The pilotThe traffic
controller
The pilot and
the master
together
636 After a collision on the high seas, the
Master of a ship sailing under its flag has
several legal duties? Which answer does
not belong in the list?
To inform the
other ship of
the name of
the ship's
agents at the
nest port of
call
To inform the
other ship of
the name of
his own ship
To inform the
other ship of
the name port
of registry and
the nearest
port a which
the ship will
call
To render
assistance to
the other
ship, her crew
and her
passengers
637 An OOW, on duty in coastal waters, notices
that he becomes too busy to be able to
take a fix. What should he do? Call the
master to
assist him
Leave the fix
until later
Ask the
lookout to
check for
other vessels
while he takes
a fix
Slow down
the vessel
638 At the commencement of a sea voyage the
master, a pilot, the oow and two ratings are
present on the bridge, who is in charge?the master the pilot
always the
officer with
the longest
sea
experience
depends on
port
authority's
decision
639 At the commencement of sea voyage the
Master , a Pilot, the OOW and 2 ratings are
present on the bridge. Who is in charge?
Always the
Master
The Master
can designate
either the
Pilot or the
OOW to be in
charge
Always the
pilot
whenever he
is on board
Either the
Pilot or the
Master in
acordance
with the
owner's
instruction
640 The captain of a vessel has 2 years of
experience as a captain and the pilot
directing the navigation has 20 years of
experience. Who is in charge? the master The Pilot
always the
officer with
the longest
sea
experience
depends on
port
authority's
decision
641 The correct order to follow when planning
a passage is: appraise,
plan, monitor,
execute
plan,
appraise,
monitor,
execute
plan, monitor,
appraise,
execute
plan, monitor,
execute,
appraise
642 The OOW has, during the pre-departure
check of the bridge equipment, found an
error in the weather facsimile. What
should he do?
Advise the
master as
soon as
possible
before the
vessel's
departure
Advise the
master after
the vessel has
departed
Call the
attention of
the 2nd
Engineer on
the fault
Record the
error in the
log book
643 The OOW on duty in coastal waters, notices
that he becomes too busy to be able to
take a fix, what should he do? call the
master to
assist him
leave the fix
until later
ask the
lookout to
check for
other vessels
while he takes
a fix
slow down
the vessel
644 The pilot gives the helmsman an order
which the OOW believe to be incorrect.
What should he do?
Ask the pilot
to clarify the
reason for the
order. If still
in doubt he
should
consult the
master and
take action if
the master is
not present
The pilot is in
control of the
vessel so he
cannot
question the
action of the
pilot
Record in the
log book
Keep quiet in
order not to
disturb the
pilot
645 What is the duty of a pilot?
To direct the
navigation of
the ship in a
certain area
To assist in
planning the
sea voyage
To be
responsible
for the
vessel's
navigation as
long as he is
on board
To relieve the
OOW on his
duty to
monitor the
navigation of
the ship
646 When at anchor, what should the OOW do
if the vessel appears to be dragging her
anchor? Call the mater
at once
Ask the
bosom to
check the
anchor
Ask the chief
engineer to
start the
engine
Any of the
other options
647 When may positions marked on the
navigation chart be erased?At the end of
the voyage
Once the
vessel is on
the next chart
After the day
has elapsed
Once the
vessel is on
the next
course
648 When may the OOW on the bridge
maneuver the engines?Whenever he
needs to
Only on
orders from
the master
Only after
informing the
master
When
approaching
port
649 When must a passage plan be prepared?
Before the
voyage
commences
Gradually
during a sea
voyage
Whenever
requested by
a pilot
Any of the
other options
650 The times of civil twilight are tabulated in
the Nautical Almanac. These times are: The LMT
when the
sun's center
reaches 6°
below the
visible
horizon
before sunrise
and after
sunset
The LMT
when the
sun's center
reaches 12°
below the
visible horizon
before sunrise
and after
sunset
The LAT when
the sun's
center
reaches 12°
below the
visible horizon
before sunrise
and after
sunset
The LAT when
the sun's
center
reaches 6°
below the
visible horizon
sunrise and
after sunset