How to Determine the Height of Tide
Finding the height of the tide is relatively simple. In the following
example, we will calculate the height of tide at the George Washington
Bridge on the Hudson River, NY. The time desired is 1100 standard
time, 8 September 1993. To make our job easier, we will use OPNAV
strip form 3530/40 HT OF TIDE.
OPNAV 3530/40 (4-73)
HT OF TIDE
Enter the desired date.
Enter the location. Find George
Washington Bridge in the alphabetical
index in the back of the Tide Tables.
The subordinate station number is
found to be #1561 in table 2.
Enter the desired time.
The reference station is found by first
finding our subordinate station
(George Washington Bridge) #1561 in
table 2, and then looking in the center
of the DIFFERENCE column and
following it upward (as shown in fig.
7-4) to the line entitled on New York
Figure 7-3 is an excerpt from table 2.
The data for steps 5, 6, 7, and 8 are
found by inspecting the times and
heights differences for 8 Sep for the
George Washington Bridge.