Originally Posted by
Capn Bloggs
"Surveillance" or lack-thereof, doesn't have anything to do with it, IMO. ATC cannot clear you to an altitude that does not provide the legal terrain clearance unless their clearance is qualified in some way. It doesn't matter if ATC can "see you" or not. They are still obligated to provide you with terrain clearance.
These are two different things. The charted MSAs relate to a non surveillance environment. If ATC can 'see' you then different MSAs obviously apply - have you ever heard ATC say something like 'descend to radar lowest safe nnn' presumably to alert that this is below the charted MSA?
Last edited by parishiltons; 15th Oct 2022 at 08:08.