Minimum Safe Altitude: From what I know, and the way this terminology is used where I fly, this basically refers to an altitude whereby on route it ensures alt clearance above all obstacles for the duration of the entire flight i.e. its the highest of all MOCAs MORAs MEAs and MSAs for the entire route. So that in an emergency situation you don't have to go scanning for the specific air route or grid minimum.
Last edited by Airmann; 3rd Oct 2012 at 17:07.