At the start of the dive, the current could be nominal, yet it can change during the dive. It can also change during the dive with the bottom topography.

Warren S/V Scuba Doo
Lagoon 50 (winner of best crewed yacht under 55 feet at the St. Thomas crewed yacht boat show).

https://www.cyabrochure.com/ebn/2307/pdyrX/6642/4///