dagger board


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dagger board

[′dag·ər ‚bȯrd]
(naval architecture)
A device used in a sailing vessel to increase the area of lateral resistance; it is a narrow metal flat or wooden board that slides up and down in the trunk, which extends from inside the hull to the bottom.
References in periodicals archive ?
Most multihull boats - which use retractable "dagger boards" in lieu of a keel - cannot sail into the wind at as steep an angle as a monohull can.
Has a canting keel, dagger boards and the latest in rigging.
The dagger boards are gravity fed through each hull with a single line, although ideally a second downhaul system could be fitted, as I had to go forward to position them just right.