How high do you have to be to need an oxygen mask?
How high do you have to be to need an oxygen mask? (3) Whenever a pressurized aircraft is operated at altitudes above 35,000 feet MSL, at least one pilot at the controls shall wear, secured and sealed, an oxygen mask required by paragraph(b)(2)(i) of this section.
Can I fly with low oxygen levels?
The current international guidelines state that if your oxygen saturation is expected to fall below 85% in- flight, a “High Altitude Simulation Test” should be performed to see whether oxygen is required on the flight and if so, how much oxygen is needed1.
How high can you fly unpressurized?
For operations conducted under Parts 121 and 135, the flight crew must use oxygen when cabin altitudes are above 10,000 up to 12,000 feet after 30 minutes and at all times when above 12,000 feet. The general aviation pilot flying an unpressurized airplane will not normally operate above 25,000 feet.
Why don t planes fly over the Antarctic?
Thanks to the low visibility and undeveloped infrastructure, flying over Antarctica is extremely difficult. Specifically, because of the strong magnetic fields that surround the polar regions, navigating there, no matter how well-equipped the airplane is in terms of instrumentation, can be particularly challenging.
Why do planes do not fly over the Pacific?
The most common reason is that there are no airstrips or airports on many of the small islands, so if a plane had to make an emergency landing, it would be difficult to find a place to land. Additionally, the Pacific Ocean is vast and remote, so if a plane were to go down, it would be very difficult to find.