Oxygen Delivery Equipment – All Souls: Passengers and Pilots
Rebreather Oxygen Masks
The rebreather oxygen mask (constant/continuous flow) is approved for use by all souls to FL250. This mask is easily identified because it will have a rebreather bag attached. Whether your oxygen supply tank is built in or portable, the crew mask must have a microphone for FL180 to FL250.
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1) Certified service ceiling of the aircraft; 2) Whether or not it is pressurized; 3) Closeup image of the oxygen and mic connector; These determine the mask flow rate (LPM)