Question 1978Navigation General

The correct answer is A) ebb current. An ebb current refers to the movement of water away from the shore or downstream, as the question states. This is the opposite of a flood current, which is the movement of water towards the shore or upstream. The ebb current occurs as the tide recedes and the water level drops, causing the water to flow away from the coastline or in a downstream direction. The other answer choices are incorrect. A reversing current refers to the change in direction of a current, not the specific movement away from the shore. A flood current is the opposite of an ebb current, representing the movement of water towards the shore or upstream. A slack current is when the water is not moving, rather than flowing away from the shore.