centerboards
Sailboat stabilizing fins
Centerboards are retractable keels on sailboats, pivoting boards that extend down through a slot in the hull to prevent sideways drift.
When sailing in shallow water, the centerboard can be raised; in deeper water, it's lowered for stability.
A boat with this feature is a centerboard boat, as opposed to a fixed-keel vessel.
Hull's structural base
- rudderPivoting stern blade
- daggerboardRetractable hull fin
- leeboardExternal anti-drift board
- trunkMain stem or storage
pivot · pin · pendant · pennant · winch · handle · gasket · slot
Small auxiliary watercraft
- sailboatWind-propelled watercraft
- catamaranDouble-hulled sailing craft
- trimaranThree-hulled sailing craft
- monohullVessel with one hull
sloop · skiff · dayboat · racer · cruiser · multihull · small craft · keelboat
Angled sailing maneuver
- jibingMatching in agreement
- windwardFacing the wind
- leewardSheltered from wind
- helmVessel's steering mechanism
heeling · righting · capsize · pointing · upwind · downwind · close-hauled · reaching
Resistance to displacement
- balanceSteadiness or amount owed
- liftMechanism for vertical transport
- dragResistance through fluid
- resistanceCapacity to withstand force
lateral · drift · leeway · foil · laminar · turbulence · efficiency · performance
keel
Hull's structural base
- rudderPivoting stern blade
- daggerboardRetractable hull fin
- leeboardExternal anti-drift board
trunk · pivot · pin · pendant · pennant · winch · handle · gasket · slot · case
dinghy
Small auxiliary watercraft
- sailboatWind-propelled watercraft
- catamaranDouble-hulled sailing craft
- trimaranThree-hulled sailing craft
monohull · sloop · skiff · dayboat · racer · cruiser · multihull · small craft · keelboat
tacking
Angled sailing maneuver
helm · heeling · righting · capsize · pointing · upwind · downwind · close-hauled · reaching · running
stability
Resistance to displacement
resistance · lateral · drift · leeway · foil · laminar · turbulence · efficiency · performance · aspect ratio