Naval History and Heritage Command
The Navy Department Library
U.S. Naval Abbreviations
A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z
--U--
Note: Where the same abbreviation has more than one meaning, the several meanings have been arranged alphabetically. Abbreviations preceded by an asterisk (*), other than Navy numbers, may never be used singly; those preceded by the symbol for number (#) are the Bureau of Personnel Condensation Code for use in dispatch orders to personnel.
U -- Chance Vought Aircraft (Division, United Aircraft Corporation) (manufacturer's symbol)
U -- Vought-Sikorsky (Division, United Aircraft Corporation) (Manufacturer's symbol)
UAP -- Utility Amphibian Plane
U/C -- Unclassified
UC -- Under Construction
UC -- United Kingdom to New York (routing designation)
UCDWR -- University of California Division of War Research
UCO -- Universal weather landing code
UCT -- United Kingdom to New York (Troop) (routing designation)
UDCA -- Undesirable discharge, trial by civil authorities
UDDE -- Undesirable discharge, desertion without trial
UDFE -- Undesirable discharge, fraudulent enlistment
UDT -- Underwater Demolition Team
UDTPhibsPac -- Underwater Demolition Teams, Amphibious Forces, Pacific Fleet
UDUF -- Undesirable discharge, unfitness
U/F -- Unit of Fire (Army)
UFU -- Utility Flight Unit
UG -- United States to Mediterranean (routing designation)
UGF -- United States to Mediterranean, Fast (routing designation)
UGS -- United States to Mediterranean, Slow (routing designation)
UHF -- Ultra High Frequency
U/I -- Unidentified
UIM -- Ufficio Informazioni Militaire (Italy)
UK -- United Kingdom
UKIP -- United Kingdom Import Plan
ULP -- Utility landplane
UN -- United Nations
Uncle -- "U" in the phonetic alphabet, replacing the obsolete "Unit"
UnderSecNav -- Under Secretary of the Navy
UNIF GRAT -- Uniform gratuity
Unit -- "U" in the phonetic alphabet, now obsolete and replaced by "Uncle"
Univ -- Universal
UNLOD -- "Discharging"
UNO -- United Nations Organization (now UN)
#UNORDGAN -- Unexecuted portion of orders hereby cancelled
UNRRA -- United Nations Relief and Rehabilitation Administration
UPO -- Unit Personnel Office (Army)
*UR -- Your(s)
URAD -- Your Radio
URDIS -- Your Dispatch
URLTR -- Your Letter
URMGM -- Your Mailgram
URMSG -- Your Message
URSER -- Your Serial
URTEL -- Your Telegram
US -- United States
U/S or US -- Unserviceable
USA -- U.S. Army
USAAF -- U.S. Army Air Forces
USAAFIME -- U.S. Army Air Forces in the Middle East
USAASC -- U.S. Army Air Service Command
USAF -- U.S. Army Forces
USAFI -- U.S. Armed Forces Institute
USAFICPA -- U.S. Army Forces in the Central Pacific Area
USAFIK -- U.S. Army Forces in Korea
USAFIME -- U.S. Army Forces in the Middle East
USAFISPA -- U.S. Army Forces in the South Pacific Area
USAFSA -- U.S. Army Forces in South America
USAIRMILCOMUNO -- U.S. Army Air Force Representative, UN Military Staff Committee
USASOS -- U.S. Army Service of Supply
USAT -- U.S. Army Transport
USBATU -- U.S.-Brazil Aviation Training Unit
USC(A) -- U.S. Code (Annotated)
USCC -- U.S. Commercial Company
USCG -- U.S. Coast Guard
USCGA -- U.S. Coast Guard Academy
USCGC -- U.S. Coast Guard Cutter
USCGR -- U.S. Coast Guard Reserve
USC & GS -- U.S. Coast and Geodetic Survey
U-sec -- Micro-seconds
USEES -- U.S. Naval Engineering Experiment Station (Annapolis)
USF -- U.S. Fleet
USF (No.) -- Current Tactical Orders and Doctrine, U.S. Fleet (No.)
USFR -- U.S. Fleet Reserve
USFR 2 -- See F
USFR 3 C -- See F
USFRD 3 D -- See F
USFR 4 C -- See F
USFR 4 D -- See F
USFR 5 -- See F
USHP -- U.S. Helium Plant (Amarillo)
USL -- Underwater Sound Laboratory
USLO -- U.S. Liaison Officer
USMA -- U.S. Military Academy (West Point)
USMAPU -- U.S. Military Academy Preparatory Unit
USMB -- U.S. Marine Barracks
USMC -- U.S. Marine Corps
USMC -- U.S. Maritime Commission
USMCAS -- U.S. Marine Corps Air Station
USMCR -- U.S. Marine Corps Reserve
USMCR(F) -- U.S. Fleet Marine Corps Reserve
USMCR(O) -- U.S. Organized Marine Corps Reserve
USMCR(V) -- U.S. Volunteer Marine Corps Reserve
USMCWR -- U.S. Marine Corps Women's Reserve
USMEMMILCOMUNO -- U.S. Members, UN Military Staff Committee
USMILCOMUNO -- U.S. Delegation, UN Military Staff Committee
USMS -- U.S. Maritime Service
USMSOS -- U.S. Maritime Service Officers School
USMSTS -- U.S. Maritime Service Training School
USN -- U.S. Navy (also indicates Regular Navy)
USNA -- U.S. Naval Academy (Annapolis)
USNACC -- U.S. Naval Member of the Allied Control Commission (Germany)
USNATRA -- U.S. Naval Training
USNAVYMILCOMUNO -- U.S. Naval Representative, UN Military Staff Committee
USNDD -- U.S. Naval Drydocks
USNH -- U.S. Naval Hospital
USN-I -- U.S. Regular Navy-Inductee
USN-I-CB -- U.S. Regular Navy-Inductee-Construction Battalion
USNIP -- U.S. Naval Institute Proceedings
USN-ISA -- U.S. Regular Navy-Inductee Special Assignment
USNLO -- U.S. Naval Liaison Officer
USNR -- U.S. Naval Reserve
USNR -- U.S. Navy Regulations
USNR M -- U.S. Merchant Marine Reserve
USNR M1 -- U.S. Merchant Marine Reserve Seagoing
USNR M2 -- U.S. Merchant Marine Reserve Coastal Defense
USNR O -- U.S. Organized Naval Reserve
USNR O1 -- U.S. Organized Naval Reserve Seagoing
USNR O2 -- U.S. Organized Naval Reserve Aviation
USNR&SL -- U.S. Navy Radio and Sound Laboratory (San Diego)
USNR SV -- U.S. Naval Reserve, Selective Volunteer
USN-SV -- U.S. Regular Navy Selective Volunteer
USNR V -- U.S. Volunteer Naval Reserve
USNTI -- U.S. Navy Travel Instructions
USO -- Under Secretary of the Navy's Office
USO -- United Service Organizations
USP -- Utility seaplane
USRad -- U.S. Fleet Shore Radio Station
USREPMILCOMUNO -- U.S. Representative, UN Military Staff Committee
USREPOF -- U.S. Navy Reporting Officer
USRO -- U.S. Routing Office
USS -- U.S. Ship (naval vessel)
USSAFE -- U.S. Strategic Air Force, Europe
USSBS -- U.S. Strategic Bombing Survey
USSECMILCOMUNO -- The Secretary, U.S. Delegation, UN Staff Committee
USSR -- Union of Soviet Socialist Republics
USSTAFE -- U.S. Strategic Tactical Air Force, Europe
USW -- Undersecretary of War
USWBC -- U.S. War Ballot Commission
UT -- United States to United Kingdom (Troop) (routing designation)
*UT -- Utility
UTC -- Unit Training Center (Army)
UtRon -- Utility Squadron
UtRonFwdArea -- Utility Squadron, Forward Area
UtWing -- Utility Wing
UtWingServLant -- Utility Wing, Service Force, Atlantic
UtWingServPac -- Utility Wing, Service Force, Pacific
