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UNBEND – To cast adrift or untie

UNCORRECTING – The conversion of courses or bearings fromtrue to magnetic to compass

UNDER FOOT - Said of anchor when it is under ship's forefoot, and cable is nearly up and down

UNDERWAY - Vessel in motion, i.e., when not moored, at anchor, or aground.

UNIFORM - As worn by yacht club members and other shore hazards, a distinctive form of dress intended to be visible at a distance of at least 50 meters which serves to warn persons in the vicinity of the long winds and dense masses of hot air associated with these tidal bores.

UNSHIP – To take apart or to remove from its place

UP ANCHOR – The order to weight anchor and get underway