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When then-president George W. Bush, a former Air National Guard fighter pilot, was flown to the aircraft carrier USS Abraham Lincoln in a Navy S-3B Viking, it was the first use of the "Navy One" call sign. The United States Navy, United States Marine Corps, and United States Coast Guard use a mixture of tactical call signs and international ...
Call sign information for U.S. stations are set out in chapter I of the FCC rules, Title 47 (Telecommunication) of the Code of Federal Regulations (C.F.R.): 47 CFR 2.302: General overview of call sign assignments, including a detailed summary of standards and practices for various license classes.
The official headquarters callsigns are usually announced at least hourly, and more frequently by Morse code. The United States Army uses tactical designators that change daily. They normally consist of letter-number-letter prefixes identifying a unit, followed by a number-number suffix identifying the role of the person using the callsign.
Base (number) Reference number used to indicate such information as headings, altitude, and fuels. Bassett Rocket-thrown ASW torpedo. Bead Window Last transmission potentially disclosed unauthorized information. Beam/beaming Target stabilized within 70 to 110 degree aspect; generally (direction) given with cardinal directions: east, west, north ...
A military service number of the Regular Army. Service numbers were used by the United States Army from 1918 until 1969. Prior to this time, the Army relied on muster rolls as a means of indexing enlisted service members while officers were usually listed on yearly rolls maintained by the United States War Department.
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).
The entire range of United States service numbers extends from 1 to 99,999,999 with the United States Army and Air Force the only services to use numbers higher than ten million. A special range of numbers from one to seven thousand (1–7000) was also used by the United States Air Force Academy for assignment only to cadets and was not ...
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