Sole

Stern

The aft end of the vessel.

SSB radio

A marine MF/HF single-side-band transceiver that, under the right conditions, can reach th…

Shoal

A patch of shallow water, often sand or mud, representing a hazard.

Shackle

A U-shaped metal fitting closed by a threaded pin (D-shackle, bow shackle, snap shackle et…

Slab reefing

A traditional reefing method (also called jiffy reefing) in which the tack and clew reef c…

Spring line

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