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How to Determine the Height of Tide, Continued
OPNAV 3530/40 (4-73)
HT OF TIDE
Corr Table III
HT of Tide
Step
Action
19.
Enter the upper portion of the table with the
nearest duration of rise or fall (upper left margin)
for 7h 09m.
19 a. Follow this line horizontally until you reach the
column for the nearest value for the time to
nearest high/low water (2 hour 3 1 minutes).
19 b.
Follow this column down to the lower half of the
table until you intersect the nearest value for the
range of tide (lower left margin). Extract the data
(1.0 ft) and enter on the worksheet.
20.
To find the final piece of information you need,
height of tide, you must apply the correction as
directed by the instructions at the bottom of table
Those instructions are as follows:
“When the nearest tide is high water, subtract the
correction.”
“When the nearest tide is low water, add the
correction.”
In this case the nearest tide is high, so you
subtract the correction (3.9 -1.0 = 2.9 ft).
Strip
Form
1.0 ft
2.9 ft
You have now computed the height of tide for 1100 standard time,
September 8, 1993, at George Washington Bridge, N.Y. The tide will be
2.9 feet above mean lower low water (charted depth).
7-11
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