Are there any boats that have anterior instead of dorsal sails to take greater advantage of currents vs winds?
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Also a sea anchor works on the same principles.
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A barge, with very little cross sectional area beneath the water line, is influenced maybe half by wind acting above the waterline and half by water pushing below the water line. A boat with a keel has a HUGE subsurface sail area and will move 99% with the currents.
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