Transom (nautical)

In some boats and ships, a transom is the aft transverse surface of the hull that forms the stern of a vessel.

[1] In small boats and yachts, this flat termination of the stern is typically above the waterline, but large commercial vessels often exhibit vertical transoms that dip slightly beneath the water.

[3] On smaller boats such as dinghies, transoms may be used to support a rudder, outboard motor, or a wind-generator pole.

On cruising yachts, the transome may hinge outwards (when at anchor) to form a swimming-cum-access platform, and to provide a lazarette for deck items and leisure toys.

[4] The term was used as far back as Middle English in the 1300s, having come from Latin transversus (transverse) via Old French traversain (set crosswise).