Question 1955Navigation General

The correct answer is A) at apogee. When the Moon is at apogee, which is the point in its orbit when it is farthest from the Earth, the gravitational pull of the Moon on the Earth's waters is reduced. This results in a decrease in the velocity of rotary tidal currents. The other answer choices are incorrect because: B) Full Moon and C) New Moon do not directly affect the velocity of rotary tidal currents. The phase of the Moon is not a factor in determining the strength of tidal currents. D) All of the above is incorrect, as only option A) is the correct answer.