4D
Air Sinai
Egypt
IATA
4D
Four Delta
ICAO
ASD
Radio Callsign
AIR SINAI
Example: "AIR SINAI One Two Three" for 4D123
About the "AIR SINAI" Callsign
When Air Sinai pilots communicate with air traffic control, they identify themselves using the radio callsign "AIR SINAI" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "AIR SINAI Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.