Which statement describes a Hydraulic Tidal Current?

Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Hydraulic tidal current is the through-flow that occurs in a strait when the water levels on opposite sides are not in phase or do not have the same tidal range. When one side rises higher or falls lower than the other, a pressure difference drives water to move through the strait to balance the levels, creating a current that can be strongest in narrow passages. This is different from wind-driven currents (which flow due to wind), longshore currents (which run parallel to the shore), or circulating eddies around a strait. So the statement describing the through-flow caused by mismatched tides at the two ends best captures hydraulic tidal current.