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Glossary term Description
VLGC

very large gas carrier

VLCC

very large crude carrier (200,000-319,999 dwt)

viscosity (Latin: viscum - tenacity) Degree of resistance to flow in a fluid or semifluid for gas, caused by internal friction
VHF

very high frequency. Radio frequency 

VDR

voyage data recorder

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)