Question 36, Air Law - Quiz SPL - Sailplane Pilot License

ALR (alerting service) SAR (search and rescue service) TWR (aerodrome control service)
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)