A public transport aeroplane is intended to be operated at FL 370. The cabin is fitted with 180 passenger seats. The minimum number of cabin oxygen masks (dispensing units) required for this aeroplane is:
Domanda 283, Operational Procedures - ATPL - Airline Transport Pilot license
| 198 (110% of the seating capacity). |
| 210 (one additional mask per seat row). |
| 240 (one additional mask per seat block). |
| 270 (150% of the seating capacity). |
