C9
Cirrus Airlines
Germany
IATA
C9
Charlie Niner
ICAO
RUS
Radio Callsign
CIRRUS AIR
Example: "CIRRUS AIR One Two Three" for C9123
About the "CIRRUS AIR" Callsign
When Cirrus Airlines pilots communicate with air traffic control, they identify themselves using the radio callsign "CIRRUS AIR" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "CIRRUS AIR Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.