Una rig
Nautical Almanac
U – Uniform
U - Uniform
Twelfths rule
Twelfths rule
Tweaker
Tweaker
TVO
TVO
Turn turtle
Turn turtle
Turn to windward, to
Turn to windward, to
Turn of the tide
Turn of the tide
Turn of the bilge
Turn of the bilge
Turn in all standing, to
Turn in all standing, to
Turnbuckle
Turnbuckle
Turk’s head
Turk's head
Tumblehome
Tumblehome
Tuck
Tuck
Tuck in, to
Tuck in, to
Tsunami
Tsunami
TSDY
TSDY
Trysail
Trysail
Trunnel, treenail, or trenail
Trunnel, treenail, or trenail
Trunk
Trunk