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Fin keel

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1.(Naut.) A projection downward from the keel of a yacht, resembling in shape the fin of a fish, though often with a cigar-shaped bulb of lead at the bottom, and generally made of metal. Its use is to ballast the boat and also to enable her to sail close to the wind and to make the least possible leeway by offering great resistance to lateral motion through the water.
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Noun1.Fin keelfin keel - a metal plate projecting from the keel of a shallow vessel to give it greater lateral stability
centerboard, centreboard, drop keel, sliding keel - a retractable fin keel used on sailboats to prevent drifting to leeward
keel - one of the main longitudinal beams (or plates) of the hull of a vessel; can extend vertically into the water to provide lateral stability
plate - a sheet of metal or wood or glass or plastic


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It is unique in that it combines the distinctive shear, highly cambered roach roof and nearly plumb bow and stem of a Cape Codstyled catboat with a moderate-aspect-ratio fin keel, low wetted surface and a partially balanced spade rudder below the waterline.
It has an ultrawide beam, 200 liters of moveable water ballast, twin rudders and a long fin keel with bulb.
The overall length of the Catalina 42 is 41'-10", beam is 13'-10", draft is 4'-10" with a wing keel, and 6' with fin keel.
 
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