Minimum Sector Altitude
|Term||Minimum Sector Altitude|
The lowest altitude which may be used which will provide a minimum clearance of 300 metres (1000 feet) above all objects located in the area contained within a sector of a circle of 46 kilometres (25 nautical miles) radius centered on a radio navigation aid or waypoint.
Aeronautical Information Feature Data Dictionary (AIFDD)
adapted from ICAO (2010) Annex 10, Meteorological Service for International Air Navigation