Minimum safe altitude (MSA). The minimum altitude depicted on approach charts which provides at least 1,000 feet of obstacle clearance for emergency use within a specified distance from the listed navigation facility.
Minimum Safe Altitude
The Minimum Safe Altitude (MSA) circle has nothing to do with the approach or the initial approach altitude or the approach segments or the procedure. The MSA is for emergency purposes only.
MINIMUM SAFE ALTITUDE WARNING- A function of the ARTS III computer that aids the controller by alerting him when a tracked Mode C- equipped aircraft is below or is predicted by the computer to go below a predetermined minimum safe altitude.
Determine Minimum Safe Altitude along route
Determine course limits left and right, this will help recognizing that a course correction is necessary
Measure the true course per leg
Select acceptable checkpoints, every 10 NM or 10 min ...
E-MSAW is a FAA Acronym for: En-Route Automated Minimum Safe Altitude Warning
Related Definitions from Aviation Glossary
GSA
GHA
Military Operations Area (MOA)
ATA - Air Transport Association
MRO ...
MSA - minimum sector altitude or minimum safe altitude.
msl - mean sea level
MTBF - mean time between failures. Also MTTR, mean time to repair ...
Make a column on your flight plan in which you note the minimum safe altitude for each leg.
Minimum Safe Altitude Warning (MSAW): a tool that alerts the controller if an aircraft appears to be flying too low to the ground or will impact terrain based on its current altitude and heading.
 See also: Flight, Altitude, Aircraft, Navigation, Expect
  
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