8/6/2019 Method to Find Times or Heights Between High and Low
Waters
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TIDALINFORMATIO
N
0
2
4
6
8
10
12
14
16
18
20
22
0
2
4
6
8
0
2
4
6
8
10
12
14
16
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20
22
0
2
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8
5431 20
5431 20
TIME
LWHW
LW
HW
HEIGHT (m)
FORMF
OR
FINDINGT
HETIMEOR
HEIGHTOFTHETIDE
Tidalpredictionfor
Exampleport
Date
September1
Time
Height
0316
0.4
Predictedtime/heightofprecedingtide
0941
3.3
Predictedtime/heightoffollowingtide
0700
2.2
Intermediatetidetime/height
Intermediatetidetime/height
Instructions
1.
Plotthepredictedtimesandheightsofhighandlow
wateroneithersideofthetimeofinterest.
2.
Jointhesepointstoobtainatime-lineandaheight-line.
3.
Toobtainaheightforagiventime,plot
thattimeonthetimeaxis,projectuptothetime-line,go
acrosstothecurve,godowntotheheig
ht-lineandthenacrosstotheheightaxistoread
offthe
height.Tofindthetimeforagivenheig
htusetheprocedureinreverse.
CopyrightCommonwealthofAustralia2007U
sedwiththepermissionoftheAustralianHydrographicService
Example:
Findtheheightofthetideat0700
usingth
efollowingprediction
informa
tion:
Previoustide:0316,
ht0.4m(LW)
Nexttide:0941,ht3.3m(HW)
0941
0316
0.
4
2.
2
3.
3
0700
