What is the minimum clearance provided by Minimum Safe Altitudes (MSA) in relation to obstacles?

The minimum clearance established by Minimum Safe Altitudes (MSA) is typically set at 1,000 feet above the highest obstacle within a specified radius around the navigation facility or waypoint. This altitude is designed to provide a safety buffer that allows aircraft to navigate safely above any terrain or obstacles while remaining as close as possible to the ground level for emergency situations or when weather conditions allow. The 1,000-foot standard is particularly significant in areas with varied terrain to ensure that, even if an aircraft experiences a loss of power or other emergencies, there remains a significant margin to prevent collisions with obstacles such as mountains, buildings, or towers.

This altitude helps pilots avoid terrain and is a critical part of planning flight paths, particularly in mountainous or obstacle-rich regions. Thus, selecting 1,000 feet is correct as it aligns with the guidance provided in aviation regulations pertaining to obstacle clearance and safety standards.