ICAO Doc 9432 - Manual of Radiotelephony
2.7.2 Aircraft call signs
2.7.2.1 An aircraft call sign shall be one of the following types:
Type |
Example |
a) the characters corresponding to the registration marking of the aircraft; |
G-ABCD or Cessna G-ABCD |
b) the telephony designator of the aircraft operating agency, followed by the last four characters of the registration marking of the aircraft; or |
FASTAIR DCAB |
c) the telephony designator of the aircraft operating agency, followed by the flight identification. | FASTAIR 345 |
Note. — The name of the aircraft manufacturer or name of aircraft model may be used as a radiotelephony prefix to the Type a) above.
2.7.2.2 After satisfactory communication has been established, and provided that no confusion is likely to occur, aircraft call signs specified in 2.7.2.1 may be abbreviated as follows:
Type |
Example |
a) the first and at least the last two characters of the aircraft registration; | CD or Cessna CD |
b) the telephony designator of the aircraft operating agency followed by at least the last two characters of the aircraft registration; | FASTAIR AB |
c) no abbreviated form. | - |
The call sign D-EAZF is a type A call sign, including the characters corresponding to the registration marking of the aircraft. The abbreviated form of a type A call sign uses the first and the last two characters of the aircraft registration. Consequently, the call sign D-EAZF is abbreviated as D-ZF.
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