key pts

8/12/2019 key pts

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COLREG-KEY POINTS

A. Which vessels don’t give any indication of size? i.e. don’t show anymasthead lights?

Ans1. Fishing vessel2. NUC3. Towed vessel4. Sailing vessel5. Pilot vessel

B. Which vessels are when Underway and possibly making way?

Ans1. PDV

2. Towing vessel3. Sailing vessel4. Mine clearance5. CBD6. Pilot Vessel7. WIG8. Seaplane

C. Which vessels do switch off something when underway and stop?

Ans1. Fishing vessel2. Trawler3. NUC4. RAM-(except Mine clearance and towing vessel)

D. Which vessels do not show anchor lights? I.e. Show same asstopped?

Ans1. Trawler

2. Fishing vessel3. Dredger

E. What lights does a Ram show at anchor?

Ans: RWR + Anchor lights

F. What light does a RAM switch off when stopped?

Ans: Except MC and Towing vsl all RAM’s switch off Masthead light, sternlight and sidelight and only show RWR.

Vinil Gupta/lecturer maritime studies/gcns ([email protected])

8/12/2019 key pts


G. What lights does a trawler show when stopped or at anchor?

Ans: Switches off sidelight and stern light. GW and Masthead light (if any)still ON.

H. Which vessels may show 2nd

masthead light if more than 50 m?

Ans: MC, CBD, RAM (expt towing vsl), PDV (expt Pilot vsl)

I. Which vessels may show 1 masthead light when more than 50 m?

Ans: Towing vessel, Trawler

J. Which vessels show no masthead light?

Ans: FV, Towed Vessel, NUC, SV, Pilot Vsl

K. What fog signal does Fishing vessel, Trawlers and RAM sound whenat anchor?

Ans: Not anchor sound signal but ONE PROLONG AND TWO SHORT(DELTA)

L. What lights/Day signal does a dredger show at anchor?

Ans: Not anchor lights or Balls but switches off Masthead light, Sidelight andstern light.

M. What lights or shape does a vessel show when towing alongside?

Ans: No towing light :0: or towing diamond ◊.

N. Fog signals for vsl at anchor or aground are based on 100 m criteriaor 50 m criteria?

Ans: 100 m

O. Do FV, Trawlers, Dredgers and vsl aground show anchor balls?

Ans: No.


8/12/2019 key pts


P. What Manoeuvring and warning signals MAY be supplemented bylight signals as per colregs?

Ans: All dids. For e.g.. ECHO “I am altering to stbd”

.. INDIA “I am altering to port” SIERRA “I am operating astern propulsion”.. WAKE UP signalBut colregs don’t specify anything for other signals such as G, Z, C, T, Mor D (i.e. Signals made in restricted Vis)

Q. What is the summary of Rule 19?

Ans

R. What is the summary of rule 18?

PDV N R F S

SV N R F

FV N R

EXCEPT RAM AND NUC ALL VSL KEEP CLEAR OFF CBD

SEAPLANE KEEP CLEARS OF ALL

WIG KEEPS CLEAR OF ALL

S. What are lights of PDV as per size?

Ans:


Stbd orslow down

Stbd orslowdown

Stbd orslow down

Port orslow down

IF OVERTAKING ANY VESSEL THENYOU CAN GO TO

PORT or STBD

50 m ormore

Less than50 m

Less than20 m

Less than12 m

Less than 7m & 7 kts

PORT or STBD

PORT

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T. What are the ranges of lights?

Ans:

50m or more 20m or more

but less than50m

12m or more

but less than20 m

Less than

12m

Mastheadlight 6 5 3 2

Sidelight 3 2 2 1

Sternlight 3 2 2 2

Towing light 3 2 2 2

All roundlights

3 2 2 2

Inscospicous partly submerged vessels light-3nm Additional lights for Fishing vessels- Minimum 1nm but less than for the FV forthat size.NB: AR light for gear extending 150 m or more is not considered additionallight for FV and should have a range for AR light as per table above. AR white light for signalling-5 miles

U. Can a sailing vessel use Red over Green lights along with combinedlantern for sidelights?

Ans: No

V. What additional lights should a trawler 20 m or more in length showapart from RED RED, WHITE WHITE OR WHITE OVER RED light whenengaged in pair trawling?

Ans: A searchlight.

W. What sound signalling apparatus should vessels carry as per theirsize?

X. As per Rule 9 and 10 are you allowed to cross a narrow channel or aTSS?

Ans: Narrow channel NO if impeding a vessels safe passageTSS YES but at a heading 90 deg to general direction of traffic flow.


Less than12m

12m or morebut less than

20m

20 m or morebut less than

100 m

100m ormore

Whistle Anythingsuitable

Y Y Y

Bell - Y Y

Gong - - Y

8/12/2019 key pts


Y. Does a vessel aground more than 100 m show deck illumination?

Ans: No

Z. Do you need to sound manoeuvring signals on whistle when altering

courses in restricted visibility?

Ans: No. Refer Rule 34 (a).

AA. How do you designate vessels as definitely or probably less than 50or more than 50m?

Ans: Anything less than 50 m is always “DEFINITELY” Anything 50 m or more is always “PROBABLY”Except for anchor vessel

BB. Do anchor lights have to be all round always?

Ans: No. Refer Annex 1, Paragraph 9 b1

CC. Which additional light signal for FV is directional?

Ans: Only gear extending 150 m or more light, hauling nets, nets fast uponobstruction, shooting nets and purse seine gear lights are not directional.

DD. What vessels can use inshore zone?

Ans: 4(BP) i.e. 3 boats + Bad weather and 4 P’s i.e. en route to pilot station,platform or offshore installations or port to port. And also to avoid immediatedanger.

DD. What vessels can use separation zone?

Ans: F - fishing vesselsL – Leaving or entering a laneA – AnchoringC – Crossing

I - To avoid immediate dangerD – Dredgers...or engaged in maintenance of safety of navigation

EE. Can a sailing vessel and a vessel less than 20 m in length useseparation Zone?

Ans: No

Vinil Gupta/lecturer maritime studies/gcns([email protected])

8/12/2019 key pts


FF. Can a towing vessel’s Towing masthead lights and 2nd Mastheadlights be swapped around ?

Ans: Yes. Refer to Annex of colreg

Vinil Gupta/lecturer maritime studies/gcns([email protected])

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key pts