Originally Posted by
BOAC
There you go, Jammed Stab, if you are still 'on frequency' - there is no real answer - best
a) Be aware of terrain yourself
b) Ask your ops dep how they do iot
c) Hope JT is your ops eng guy
Correct, there has been no answer given(and it is quite obvious that I could never get a correct one from Flyboyike). It would appear that perhaps there is no regulation.
Please don't get hung up on Calgary as I was only using the picture as an example of relatively flat followed by a wall of rock and stated that in that case the wall is quite far so forget the city name and use the picture as a reference.
No doubt, there is somewhere similar where the wall of rock is not nearly as far but isn't really close. If it is 72000 feet only or 10 miles or less for a turn to be required, there is an extremely high chance that someone will plow into it.
Think dark night/IMC at an unfamiliar airport with no radar and frequently, there is no radar in mountainous remote mountains.