STUDDING-SAIL BOOM. A spar rigged out for the purpose of setting a studding-sail, and taking its name from the sail it belongs to.

STUDDING-SAILS. Fine-weather sails set outside the square-sails; the term "scudding-sails" was formerly used.—Top-mast and top-gallant studding-sails. Those which are set outside the top-sails and topgallant-sails. They have yards at the head, and are spread at the foot by booms, which slide out on the extremities of the lower and top-sail yards, and their heads or yards are hoisted up to the top-sail and top-gallant yard-arms.

STUDDING-SAIL YARD. The spar to which the head of the studding-sail is extended.

STUFF. A coat of stuff, a term used for any composition laid on to ships' spars, bottom, &c. Also, square timber of different thicknesses.

STUFFING-BOX. A contrivance on the top of a steam cylinder-cover, packed with hemp, and kept well soaked with tallow, to prevent steam from passing through while the piston-rod is working.

STUMP. A derogatory but well-known name in navigating our eastern coasts for the beautiful tower of Boston church. (See [Snags].)

STUMP TOPGALLANT-MASTS. Those without a royal pole.

STUN-SAILS. A corruption of [studding-sails] (which see).

STURGEON. Acipenser sturio, a large fish; it has a cartilaginous skeleton, with a small circular and tubular mouth. It is found in the European seas and larger rivers. The roes are made into caviare, and the sounds and muscular parts into isinglass. It is a royal fish in England.

STURRE-MANNE. An old name for a sea-captain.