ATPL: SSR - TransponderWhen an aircraft carries a serviceable transponder, the pilot shall operate the transponder:
Domanda 365, Air Law - ATPL - Airline Transport Pilot license
| Only when the aircraft is flying within controlled airspace. |
| Only when the aircraft is flying within airspace where SSR is used for ATS purposes. |
| Only when directed by AT |
| At all times during flight, regardless of whether the aircraft is within or outside airspace where SSR is used for ATS purposes. |
