A time of no tide-induced currents that occurs when the current changes direction.

• A. Tidal Bore
• B. Slack Water
• C. Tidal Current
• D. Solar Tide

Answer: (B)

Slack water is the moment in a tidal cycle when the current stops briefly as it changes direction. As the tide shifts from ebb to flood (and again from flood to ebb), the flow slows to nearly zero, producing a short interval with little or no tide-induced movement. This happens twice each tidal day, around high water and around low water, when the water is turning and the current momentarily pauses before reversing.

This fits the idea of a no-flow moment during a reversal, unlike a tidal bore (a surge moving upstream), a general tidal current (any tidal flow, not specifically the pause), or a solar tide (tides driven mainly by the Sun, not the reversal timing).