Enough Oxygen?
I recently travelled from LHR to HKG on an NZ 777.
I was more than a little surprised to see that we followed the Y1 route to the south of Urumqi.
An area with MSA's in excess of 20,000. I know the 777 can maintain that engine out, but what about the oxygen requirements.
Looking at a map there must be a position along that route where it would take longer than 15-20 minutes (chemical oxygen) to get to a 14,000 MSA.
What's the deal