Marina Board Exam: Why is the height of the tide in the Tide Table essential in determining the true depth of water at any time than shown in the chart?

Marina Board Exam

Why is the height of the tide in the Tide Table essential in determining the true depth of water at any time than shown in the chart?

A. The height of the tide may be checked readily by taking soundings to be sure of the keel clearance from the bottom 
B. If the height of the tide is equal to the charted depth is an alarm that the ship may touch bottom 
C. The depth of the water at any time is obtained by adding the height of the tide to the charted depth 
D. The depth of the water at any time is obtained by subtracting the height of the tide if it is negative 



Answer:  A. The height of the tide may be checked readily by taking soundings to be sure of the keel clearance from the bottom