The Sailor's Word-Book / An Alphabetical Digest of Nautical Terms, including Some More Especially Military and Scientific, but Useful to Seamen; as well as Archaisms of Early Voyagers, etc.

by W. H. Smyth

THWART CLAMPS OR KNEES. Those which secure the after, main, and fore thwarts to the rising and gunwales, and which support the masts.

THWART-MARKS, to a Harbour. Two objects on the land, which, brought into line with each other, mark the safe course between shoals, as those on Southsea Common act for the Needles, Swashways, &c.

THWARTS (properly Athwarts). The seats or benches athwart a boat whereon the rowers sit to manage their oars.

THWART-SHIPS. Across the ship, or from one side to the other. (See [Athwart].)

TIBRIC. An old name for the coal-fish.

TIBURON [Sp.] The shark.

TICKET. An official warrant of discharge, so that a heavy penalty attaches to the loss of any of the blank ones in the captain's charge. It is always used in counterparts, which are ordered to be perfect duplicates of each other.

TICKET-BOOK. A register for accounting for all tickets and certificates received and used.

TICKLING OF FISH. The same as gennelin. (See [Groping].)

TIDAL WAVE. The wave caused by the combined action of the sun and moon: its greatest influence is felt some time after the moon has passed the meridian of any place.