Join Date: Dec 2004
Location: Portugal, West Coast
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On stability: waves - interesting movie.
Look at mim 8.06 to something I had said already here: Modern light boats with narrow fin keels or a foil with a torpedo with a good stability when hit sideways by a breaking wave are able to dissipate a substantial part of the wave energy transforming that in a sideaway movement.
An heavy full keeler would not be able to do that, it would trip on the keel and would transform almost all the wave energy in a rotating movement.
A centerboarder (with the board up) with a good stability would be able to dissipate even more energy that way, sliding even more sideways.
Regarding the use of sail to stabilize the boat in waves look at the small boat that enters at min 5.18. Coming downwind under full main maintaining the center of effort of the sail near the center of the boat, keeps the boat straight till turning sharply to the wind at the entrance and motors in with the sail on the wind. Nice and clean
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