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Minimum Sector Altitude (MSA) (MSA)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: msa.ttl
- Name
minimumSectorAltitude- Datatype
- Real
- Definition
- 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.
- Synonyms
- MSA
- Accepted
- 2013-10-18
- Defined by
- DFDD
- Physical quantity
- length
- Recommended unit
- Metre (m)
- Used by
- GA021 Safe Altitude Area (SAA)
- GA022 Safe Altitude Area (SAA) Sector
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.