For a non pressurised aircraft, 100% of passengers shall be supplied with supplemental oxygen during:
Domanda 290, Operational Procedures - ATPL - Airline Transport Pilot license
| The entire flight time after 30 minutes at pressure altitudes greater than 10 000 ft but not exceeding 13 000 ft |
| The entire flight time at pressure altitudes above 10 000 ft |
| The entire flight time at pressure altitudes above 13 000 ft and for any period exceeding 30 minutes at pressure altitudes above 10 000 ft but not exceeding 13 000 ft |
| The entire flight time at pressure altitudes above 13 000 ft |
