HT
Hellenic Imperial Airways
Greece
IATA
HT
Hotel Tango
ICAO
IMP
Radio Callsign
IMPERIAL
Example: "IMPERIAL One Two Three" for HT123
About the "IMPERIAL" Callsign
When Hellenic Imperial Airways pilots communicate with air traffic control, they identify themselves using the radio callsign "IMPERIAL" followed by the flight number spoken in aviation pronunciation. For example, flight 456 would be "IMPERIAL Four Five Six." Radio callsigns are assigned by ICAO and are distinct from the airline's marketing name.