U UNDERWAY Vessel in motion, i.e., when not moored, at anchor, or aground.
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 und
UBS universal bulk ship
UEL upper explosive limit
UFL upper flammable limit
UHF ultra high frequency
UKOOA  United Kingdom Offshore Operators Association
ULBC ultra large bulk carrier
ULCC Ultra Large Crude Carriers. Tankers larger than 300,000 dwt.
Ullage Free space above a liquid contained in a tank, drum or tank-container, expressed as a percentage of the total capacity. Ullage is often used to leave room for possible expansion of the liquid.
Ultimate Consignee Party who has been designated on the invoice or packing list as the final recipient of the stated merchandise.
Ultra Large Crude Carrier A vessel designed for the carriage of liquid cargo in bulk with a loading capacity from 250.000 till 500.000 DWT.
UMS  Universal Measurement System
UN United Nations
Unaccompanied Baggage Luggage not accompanied by a passenger.
Unclos United Nations Convention on the Law of the Sea
UNCTAD United Nations Conference on Trade and Development
Undercarriage 1. A supporting frame or structure of a wheeled vehicle.
Undercarrier A carrier in a conference or consortium who carries less cargo than the allotment distributed to him.
UNDERWAY Vessel in motion, i.e., when not moored, at anchor, or aground.
UnderWay: Not attached to the shore or the ground in any manner. Usually, but not necessarily, moving through or making way through the water.
Unfurl To unfold or unroll a sail. The opposite of furl.
Uniform The in 1993 revised rules of the International Chamber of Commerce (ICC) governing a letter of credit issued in respect of goods shipped applicable as from 1-1-1994.
Union Internationale des Chemins de Fer International railway union, in which most of the European national railway companies are united.
Unit Load A number of individual packages bonded, palletised or strapped together to form a single unit for more efficient handling by mechanical equipment.
Unit Load Device 1. Any type of container or pallet, in which a consignment can be transported by air whether or not such a container is considered aircraft equipment.
United Nations Conference on Trade and Development A United Nations agency whose work in Shipping includes the liner code involving the sharing of cargoes between the Shipping lines of the importing and exporting countries and third countries in the ratio 40:40:20.
United Nations Dangerous Goods Number The four-digit number assigned by the United Nations Committee of Experts on the Transport of Dangerous Goods to classify a substance or a particular groups of substances.
United Nations Economic Commission for Europe The UN/ECE is one of a number of Economic and Social Commissions established by the General Assembly of the United Nations. Despite its name it embraces both Europe and North America. The UN/ECE comprises twenty nine core member states, as well as any cou
United Nations Layout Key A standard (ISO6422) which lays down the basic principles for the design of the image area on documents for use in international trade.
United Nations Standard Message A collection of structured data that is exchanged to convey information related to a specific transaction between partners engaged in electronic data interchange. Messages are composed of logically grouped segments required for the type of message transac
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.
Unmoor: To cast off hawsers by which a vessel is attached to a buoy or wharf. To weigh one anchor when riding to two anchors. To remove a mooring swivel when moored to two cables.
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.
Unship: To remove from a ship. To remove an item from its place.
Up and Down: Said of cable when it extends vertically and taut from anchor to hawsepipe.
UPS uninterrupted power supply
Upwind To windward, in the direction of the eye of the wind.
USCG United States Coast Guard
UTC co-ordinated universal time
UTC universal time (coordinated)
Utilisation Rate The quotient of used capacity and available capacity.