... of surface water in the downwind direction, hence Langmuir spirals (you see the evidence of those spirals in the form of streaks of foam on windy days, with all the streaks being parallel), the accumulation thick algae and warm surface waters on downwind sides of a lake, etc, but though huge volumes of water are moving downwind (and correspondingly huge volumes of deeper water are flowing in the opposite direction), the speed of flow is so much slower than the speed of a boat that no one would ever notice it.
By the way, this downwind surface flow movement is independent of what happens due to wave action, and the two things are not related.
Canoe / Kayak Anchors
Full Size Sail Rig
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