Seacock

A through-hull valve that can be opened or closed to admit water to, or prevent water from entering, the boat through engine, heads, galley, or cockpit drain fittings.

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Related S-terms

Stern

The aft end of the vessel.

Spar

Any pole that supports a sail — mast, boom, gaff, sprit, yard, whisker pole, or spinnaker …

Swamped

A vessel filled with water but still floating.

Spinnaker

A large, light downwind sail, symmetric or asymmetric, flown from a halyard rather than a …

Sloop

A single-masted rig with a mainsail and a single headsail — the commonest modern configura…

Spring line

A dockline led fore or aft along the hull to the dock to stop the boat moving forward or b…

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