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SAM 28000, one of the two VC-25s used as Air Force One, flying over Mount Rushmore in February 2001. The United States Army uses fixed station call signs which begin with W, such as WAR, used by U.S. Army Headquarters. Tactical call signs are often assigned to a company sized unit or higher.
FM boosters receive call signs which repeat the entire call sign of the primary station, plus a sequential numeric suffix, like "FM1". Only LPFM boosters have multiple suffixes. The longest possible call sign in the United States (nine characters) went into use for the first time July 22, 2017, when KWSV-LP signed on booster KWSV-LP-FM1. [16]
Air Force One; Air Force Two; Air India One; Airline codes; Call signs in Antarctica; ... RBU (radio station) Call signs in Russia; S. Call signs in South America;
The first Eighth Air Force aircraft to receive unit markings were the Spitfires of the 4th and 31st Fighter Groups training with RAF Fighter Command in September 1942. The markings were two-letter fuselage squadron codes located on one side of the national insignia and a single letter aircraft code on the other side.
Station call signs (RAF Halesworth's was STURDY, and RAF Boxted's DOGDAY) were unchanged, but all previous call signs were discontinued. In 1945 provision was also made for a C Group on missions (usually only 8 to 12 fighters) and all fighters assigned to a C Group mission used the common call sign. Operations Identification Data
Most units of the Royal Air Force (RAF) are identified by a two character alphabetical or alpha- numeric combination squadron code. Usually, that code is painted on the aircraft belonging to that squadron. The squadron code is usually presented along with an individual letter or character to form a call sign for the
Russian nuclear icebreaker Arktika with call sign UKTY. Merchant and naval vessels are assigned call signs by their national licensing authorities. In the case of states such as Liberia or Panama, which are flags of convenience for ship registration, call signs for larger vessels consist of the national prefix plus three letters (for example, 3LXY, and sometimes followed by a number, e.g. 3LXY2).
Radio call signs are a globally unique identifier assigned to all stations that are required to obtain a license in order to emit RF energy. The identifiers consist of from 3 to 9 letters and digits, and while the basic format of the call signs are specified by the ITU-R Radio Regulations, Article 19, Identification of stations, [5] the details are left up to each country's radio licensing ...