thumb|A Dutch sailing barge showing its stowed windward leeboard, hiked up with wind from starboard thumb|Leeboard deployed on a Thames sailing barge on the East Swin thumb|right|alt=Modern sharpie fitted with leeboards|The Centennial a 1979 Ted Brewer sharpie fitted with leeboards
thumb|A Dutch sailing barge showing its stowed windward leeboard, hiked up with wind from starboard thumb|Leeboard deployed on a Thames sailing barge on the East Swin thumb|right|alt=Modern sharpie fitted with leeboards|The Centennial a 1979 Ted Brewer sharpie fitted with leeboards
A leeboard is a form of pivoting keel used largely by sailboats, very often in lieu of a fixed keel. Typically mounted in pairs on each side of a hull, leeboards function much like a centreboard, allowing shallow-draft craft to ply waters inaccessible to fixed-keel boats. Only the leeward side leeboard is used at any time, as it submerges when the boat heels under the force of the wind.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).