| FIS (flight information service) AIS (aeronautical information service) AFS (aeronautical fixed telecommunication service) |
| APP (approach control service) ACC (area control service) FIS (flight information service) |
| TWR (aerodrome control service) APP (approach control service) ACC (area control service) |
| ALR (alerting service) SAR (search and rescue service) TWR (aerodrome control service) |
EN 