What clearance is guaranteed by the MSA?

The Minimum Safe Altitude (MSA) is designed to provide a level of safety for aircraft operating in a given area, especially in the event of an emergency or unexpected circumstances. The clearance guaranteed by the MSA is typically 1,000 feet above the highest obstacle within a specific radius around the route or waypoint in question. This altitude ensures that an aircraft has sufficient vertical separation from any terrain or man-made structures, therefore reducing the risk of collision and enhancing safety margins.

In aviation, it's crucial to possess awareness of MSA, as it plays a significant role in navigation and emergency procedures. Pilots rely on these altitudes to ensure a safe operating envelope, particularly in unfamiliar or mountainous regions where obstacles may not be immediately visible. The choice of 1,000 feet as the guaranteed clearance reflects a standard safety buffer that has been determined through extensive evaluation of accident data and terrain analysis.