78. What does the drift and set of tidal, river, and ocean currents refer to?

Drift and set refer to the speed (drift) and direction (set) of a current's flow. These are standard nautical terms describing a current's movement, impacting a vessel's course and speed over ground. The correct answer accurately defines drift and set as the speed and direction toward which a current flows, distinguishing it from descriptions of current type, location, or duration.