Category of flight (IFR, VFR or both) | Route (Into | Message Address |
---|---|---|
1 | 2 | 3 |
All flights | Into or via Ha Noi FIR and the | VVHNZQZX |
Into or via Ho Chi Minh FIR except the | VVHMZQZX | |
Specify destination aerodrome | Specify ICAO location indicator + ZTZX | |
Specify ICAO location indicator + ZPZX |