THWART Plank set athwartships just below
the gunwales in an open boat; acts as a seat and
provides support to the sides.
TOPSIDE Generally refers to weather
TRANSVERSE FRAME Structural member
that extends outward from the keel and upward
to the main deck.
TRICE UP To secure bunks by hauling them
up and hanging them off (securing them) on their
TRUNK The uppermost tip of a mast.
TURNBUCKLE Device for setting up a
tension, as in a lifeline, by turning a buckle into
which two eyebolts are threaded.
TURN OF THE BILGE Where the side
meets the bottom.
TURN IN (1) Retire to bed. (2) Return
articles to the issue room.
TURN OUT (1) Get out of bed. (2) Order
out a working party or other groups, as to turn
out the guard.
TURN TO Start working.
UP ALL LATE BUNKS An order to per-
sonnel entitled to sleep after reveille to get up.
UPPER DECK The first deck above the
VEER (1) To allow a line, wire, or chain to
run out by its own weight. (2) To swerve. (3) Act
of the wind in changing direction clockwise.
VOID An empty tank.
WAIST The amidships section of the main
WAKE Trail left by a vessel, or other
object, moving through the water.
WARDROOM Officers messing compart-
WATCH (1) One of the periods (usually
4 hours) into which a day is divided. (2) A
particular duty, as lifebuoy watch. (3) The act of
a buoy or other marker in indicating the position
of a sunken object.
WATERTIGHT INTEGRITY A ships degree
of resistance to flooding.
WAY (1) Horizontal motion of a floating
body. (2) Launching track in a shipbuilding yard.
WEATHER DECK Any deck exposed to the
WET DOCK A basin formed, by the con-
struction of barriers with gates, in a harbor
of great tidal ranges to prevent ships from
being stranded during low tides. Ships enter
the basin at high tide, the gates are closed,
and the water is retained in the basin when the
WHARF Similar to a quay, but constructed
in the fashion of a pier.
WHIPPING Binding on the end of a line or
wire to prevent unraveling.
WILDCAT That portion of a windlass
which engages the links of the anchor chain so
that the anchor can be heaved in.
WINDWARD Toward the direction from
which the wind is blowing.
YARD Spar set athwartships across the
upper part of a mast.
YARDARM The port or starboard half of
the horizontal crosspiece of the mast that is either
the port or starboard yardarm.
YAW The act of a vessel when its heading
is thrown wide of its course by a force from
astern, such as a heavy following sea.