Definition that contains fin keel
- centerboard a retractable fin keel used on sailboats to prevent drifting to leeward
- centreboard a retractable fin keel used on sailboats to prevent drifting to leeward
- drop keel a retractable fin keel used on sailboats to prevent drifting to leeward
- sliding keel a retractable fin keel used on sailboats to prevent drifting to leeward