When 'Secondary Radar' is used, an aircraft may be identified by one of the following procedures:
Domanda 203, Air Law - ATPL - Airline Transport Pilot license
| To request pilot to set transponder on position 'OFF'. |
| To request pilot to set transponder on position 'ON'. |
| To request pilot to switch from 'ON' to 'STDBY'. |
| Observation of compliance with an instruction to operate transponder from 'ON' to 'STBY' and back to 'ON'. |
