A (22) | B (29) | C (39) | D (16) | E (14) | F (27) | G (10) | H (16) | I (18) | J (1) | K (6) | L (26) | M (18) | N (8) | O (5) | P (24) | R (10) | S (45) | T (14) | U (11) | V (9) | W (6)
Glossary term Description
USD

United States dollar

USCG United States Coast Guard.
USACE

US Army Corps of Engineers

US Gulf Shipping abbreviation for the Gulf of Mexico.
United Kingdom

England, Wales, Scotland, Northern Ireland and islands governed from the mainland (ie excluding the Channel Islands and the Isle of Man)

unit loads

Unit loads are parts of a shipment that can be treated as a single unit during cargo handling and transportation. The most common unit loads are pallets and components with bases that resemble pallets. The most important properties of a unit load are that it can be loaded to ensure a tight fit, its modularity and its stability, the last of which ensures that it can be stowed safely and will not be damaged by load securing measures.

UNCTAD Code Now known as UN/LOCODE. UNCTAD is the United Nations Conference on Trade and Development.
UNCLOS

United Nations Conference on the Law of the Sea

ULCC

ultra-large crude carrier: 320,000+ dwt 

UKC

under-keel clearance. Allowance made to ensure a certain clearance between the ship's bottom and the seabed. See also DUKC.