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U.S. EFFECTIVE CONTROLLED FLEET That fleet of merchant ships owned by United States citizens or corporations and registered under flags of "convenience" or "necessity" such as Liberia or Panama. The term is used to emphasize that, while the fleet is not U.,$.-flag, it is effectively u
UBS universal bulk ship
UEL upper explosive limit
UFL upper flammable limit
UKOOA United Kingdom Offshore Operators Association
ULBC ultra large bulk carrier
ULCC Ultra Large Crude Carriers. Tankers larger than 300,000 dwt.
UMS Universal Measurement System
UN United Nations
Unclos United Nations Convention on the Law of the Sea
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UNCTAD United Nations Conference on trade and Development
UNDERWAY vessel in motion, i.e., when Not moored, at anchor, or aground.
UNMANNED MACHINERY SPACES a space where alarm bells are installed on the bridge of a ship to trace or rectify Any machinery faults. the computerized devices will report Any fault immediately It appears and the engineers on board can attend to the necessary ramifications.
UNSEAWORTHINESS the state or condition of a vessel when It is not in a proper state of maintenance, or if the loading equipment or crew, or in Any other respect is not ready to encounter the ordinary perils of sea.
UPS uninterrupted power supply
USC Unless Sooner Commenced
USCG United States Coast Guard
UTC universal time (coordinated)
UU Unless Used
UUIWCTAUTC Unless Used In Which Case Time Actually Used To Count
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