What is needed to calculate the speed and direction of tidal current while at sea?
a. The shape of the ocean basin below
b. The magnitude of gravitational forces and inertia
c. The position of the amphidromic point
d. All of these choices
ANS: D
The velocity of tidal currents is less in the open sea because it is not as confined as it is closer to shores
and harbors. They tend to decrease in velocity with depth in the open ocean. Information can be found
in the section The Dynamic Theory of Tides Adds Fluid Motion Dynamics to the Equilibrium.
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Fill in the blank(s) with the appropriate word(s).