What sort of "terrain" is around 41,000 feet?
Or am I missing something?
"There is an airline over the last 3 months that has maintained a procedure on certain routes at cruise altitudes up to 41000ft,"
"The requirement was due to terrain but with no work done on escape routes, this was the fix."
Mount Everest is called the world's highest mountain because it has the "highest elevation above sea level". We could also say that it has the "highest altitude". The peak of Mount Everest is 8,850 meters (29,035 feet) above sea level. No other mountain on Earth has a higher altitude