A board that slides vertically through the keel of a sailboat to reduce sideways movement. Compare with centerboard.
- Late last week, Kingfisher hit a submerged object and damaged her daggerboard.
- If the rudder and daggerboard are made of plywood and glassed they will need to be primed and painted.
- Contrary to popular belief, the daggerboard or centerboard does not keep the sailboat from tipping over.
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