System UAV – Unmanned Aerial Vehicle UCMJ – Uniform Code of Military Justice UCT – Underwater Construction Team UDT – Underwater Demolition Team UNODIR – Unless Otherwise Directed UNREP – Underway Replenishment UNSAT – Unsatisfactory UOD – Uniform of the day URL – Unrestricted Line Officer USCG – United States Coast Guard USMC – United States Marine Corps, organized under the United States Department of the Navy USN – United States Navy USNA – United States Naval Academy (Annapolis) USNR – United States Naval Reserve USS – United States Ship UWT – Underwater Telephone V VA/VAM – Fixed Wing Attack/Fixed Wing Medium Attack (no longer used) VAQ – Fixed Wing Electronic-Attack Squadron VAW – Fixed Wing Airborne Early Warning Squadron VBSS – Visit, Board, Search, and Seizure VCNO – Vice Chief of Naval Operations VDS – Variable Depth Sonar VERTREP – Vertical Replenishment VF – Fixed Wing Fighter (no longer used) VFA – Fixed Wing Strike Fighter Squadron VLS – Vertical Launching System VP – Fixed Wing Patrol Squadron VRC – Fleet Logistics Support Squadron (VRC-30 Providers) VTU – Volunteer Training Unit VX – Air Test & Evaluation Squadron (VX-4 Evaluators) W WAVES – Women Accepted for Volunteer Emergency Service WCS – Workcenter Supervisor WO – Warrant Officer WSO – (Wizzo) – Weapon Systems Officer (Naval Flight Officer) in USMC F/A-18D Hornet and USN F/A-18F Super Hornet) WTC – Watertight Compartment WTD – Watertight Door WTF – Whiskey Tango Foxtrot, usually an interrogative phrase, but may also be used in a declarative manner WTH – Water Tight Hatch X XO – Executive Officer Y YN – Yeoman See also List of acronyms List of military slang terms Glossary of nautical terms (A-L) Glossary of nautical terms (M-Z) United States Navy bureau system List of U.S. government and military acronyms List of U.S. Marine Corps acronyms and expressions List of U.S. Air Force acronyms and expressions Notes References External links Navy Acronyms and Navy Abbreviations EEBD - Emergency Escape Breathing Device Z Acronyms list Navy Navy Navy United states Navy