MAC
Mid-air collision
MANPADS
Man Portable Air Defense Systems
MAP
Manifold Absolute Pressure or Missed Approach Point
MAP
Missed Approach Point
MATS
Manual of Air Traffic Services
MB
Marker Beacon
MCBF
Mean Cycles Between Failures
MDA
Minimum Decent Altitude
MDA/H
Minimum Descent Altitude/Height
MEDEVAC
Medical Evacuation
MEF
Maximum Elevation Figure
MEL
Minimum Equipment List
METAR
Meteorological Aerodrome Report (METAR)
MF
Medium Frequency
MFD
Multi-Function Display
MFDS
Multi-Function Display System
MIC
Microphone
MILSPEC
Military Specification
MITA
Multilateral Interline Traffic Agreements
MKR
Marker Beacon or Marker[disambiguation needed]
MLS
Microwave Landing System
MLS
Microwave Landing System
MLS
Microwave Landing System
MM
Middle Marker
MM
Middle Marker
MMD
Moving Map Display
MNPS
[Minimmum Navigation Performance Specifications
MOA
Military Operations Area
MOC
Minimum Obstacle Clearance
MOT
Ministry of Transport (various countries)
MOU
Memorandum of Understanding
MP
Manifoil Pressure
MRO
Maintenance Repair Overhaul
MSA
Minimum Safe Altitude / Minimum Sector Altitude
MSG
Message
MSL
Mean Sea Level
MSP
Modes S Specific Protocol
MSSS
Mode S Specific Services
MTBF
Mean Time Between Failures
MTOW
Maximum Take-Off Weight
MTTF
Mean Time To Failure
MZFW
Maximum Zero-Fuel Weight
Mode A
Transponder pulse code reporting
Mode C
Transponder code and altitude reporting
Mode S
Transponder code, altitude, and TCAS reporting