SkyguyB727 From , joined Dec 1969, posts, RR: Posted (5 years 6 months 20 hours ago) and read 2581 times:
The other day, I saw some charter paperwork from Miami Air. The paperwork showed their SITA (teletype) address as: MIAOOGL. The airline code GL is assigned to Air Greenland. I don't understand how the ARINC switching center would recognize a teletype message addressed to MIAOOGL as a message to Miami Air (whose airline code is Z1).
LN-MOW From United States of America, joined Jan 2000, 1907 posts, RR: 14
Reply 2, posted (5 years 6 months 8 hours ago) and read 2317 times:
It is a so called 'controlled duplicate' As there are more airlines than there are combinations of two letters, IATA has issued a number of these.
''IATA Airline Codes are used to identify an airline for all commercial purposes. the two character airline designator is assigned by IATA in accordance with the provisions of Resolution 762. The two character airline designator listed are for use in reservations, timetables, tickets, tariffs, air waybills, schedules publications and in airline interline telecommunications, as well as for the airline industry applications. IATA assigns three types of two character airline designators. Unique, numeric/alpha and controlled duplicate ''