Grid MORAs do not match FAA

I’ve noticed that many of the grid MORAs shown on the charts do not match those found in the FAA-issued low enroute charts. Does anyone know the reason for the difference?

1 Like

Hello, can you give some examples with a screen shot?

Screenshots can be posted using Guide to posting Screenshots


They use a different methodology when determining terrain clearance (ie mountainous regions).
see here:

Thanks for sharing that, cowpatz. Much appreciated!

Great answer & thank you very much for your support … thank you very much.
Beside of that, I also learn every day - didn´t know that … thanks for sharing this details @cowpatz


This topic was automatically closed 2 days after the last reply. New replies are no longer allowed.