M
M:M : Many-to-Many relationship
M : Mach Number (followed by figures)
M : Manual Tuned NAVAID
M : Million
M : Modules (replaceable)
M : Symbol for Mega (10+6)
m : Symbol for milli (10-3)
m. : meter
m : Nautical mile (preceded by figures)
m/sec : Metres per second
M/ASI : Mach/Airspeed Indicator
M/T : Medium-Term
MA : Malev Hungarian (airline)
MA : Member Association
MA : Message Assurance
MA : Morocco (ISO Countries Codes)
MAA : Maximum Authorized IFR Altitude
MAC : Management Advisory Committee
MAC : Mean Aerodynamic Chord
MAC : Medium Access Control (RMCDE)
MAC : Message for the Abrogation of Coordination
MAC : Mid-Air Collision
MAC : Military Airlift Command
MACC : Manchester Area Control Centre
MACC : Military Area Control Centre
MACE : Multi-criteria analysis for Concept Evaluation
MACEN : Mando Centra
MACS : Multiple Access Communications System
MAD : Model of Activity for Design
MADAP : Maastricht Automated Data Processing and
Display System
MADREC : Maastricht Data Recording
M-ADS : Modified Automatic Dependent Surveillance (ICAO)
MAESCAPE : Eurocontrol Simulation Capability and Platform for Experimentation tailored to Maastricht UAC
requirements
MAESTRO : Means to Aid Expedition and Sequencing of Traffic with Research and Optimisation
MAG : Magnetic
MAHF : missed Approach Holding Fix
MAHWP : Missed Approach Holding Waypoint
MAINT : Maintenance
MALS : Medium Intensity Approach Light System
MALSF : Medium Intensity Approach Light System with Sequenced Flashers
MALSR : Medium Intensity Approach Light System with Runway Alignment Indicator Lights
MAN : Manual Message
MAN : Metropolitan Area Network
MANACT : Manual Activation message
MANTEA : Management of Surface Traffic in European Airports
MAP : Aeronautical Maps and Charts
MAP : Mapping
MAP : Military Assistance Program
MAP : Missed Approach
MAPPER : Maintaining, Preparing & Producing Executive Reports
MAPt : Missed Approach Point
MAR : At Sea
MAR : Mode A Reconstructor
MARAS : Middle Airspace Radar Advisory Service
MARRES : Manual Radar Return Exploitation System
MARS : Maastricht Reserve System
MARS : Military Air Route Structure
MARSA : Military Authority Assumes Responsibility for Separation of Aircraft
MART : Message Acknowledge Response Time
MARTOS : MADAP Real-Time Operating System
MAS (UAC) : Maastricht Upper Area Control Centre
MAS : Manage Airspace
MAS : Manual Assume of Control Message
MAS : Manual A1 Simplex
MAS : Message Assurance Service
MAS : Middle Airspace
MAS : Military Agency for Standardisation
MAS : Multiple Access Store
MASAW : Minimum Safe Altitude Warning
MASI : Mach Airspeed Indicator
MASOR : Military Area Services Operations Room
MASP : Minimum Aviation Specification Performance
MASPS : Minimum Aircraft System Performance Specification (ICAO) ; Minimum Aviation System
Performance Standards
MASS : Multi-Aircraft Simplified Simulator
MAST 4 : 4 States Integration and Maastricht Development Steering Group
MAST : Multi-Aircraft Simulation Terminal
MAT : Mackinnon Aerospace and Training
MAT : Message Acknowledge Time
MATCC : Military ATC Centre
MATE : Multi-Aircraft Training Environment
MATIAS : Magyar (Hungarian) Automated and Integrated Air Traffic Control System
MATO : Military Air Traffic Operations
MATRAC : Military Air Traffic Radar Control Centre
MATS : Manual of Air Traffic Services
MATSE : ECAC Transport Ministers’ Meeting on the Air Traffic System in Europe
MATWP : Missed Approach Turning Waypoint
MATZ : Militairy Aerodrome Traffic Zone
MAU : Modular Avionics Unit
MAV : Medium Access Control
MAWP : Missed Approach Waypoint
MAX : Maximum
MAX CLB Maximum engine thrust for two-engine climb
MAX CRZ Maximum engine thrust for two-engine cruise
MAZ : Mini ASCAP-ZKSD Coupling
MB : Mega Byte
Mb : Millibars
MB : MariBor
MB-II : Multibus II (RMCDE)
MBA : Micro Burst Alert (used to warn of a loss of 30 knots or more associated with convective activity)
MBO : Management by Objectives
Mbps : Mega Bits per second
MBR : Mittel-Bereich radar
MBST : Microburst
MC : Main Computer
MC : Monaco (ISO Countries Code)
MCA : Minimum Crossing Altitude
MCC : Main Computer Complex (Maastricht)
MCC : Military Control Centre
MCC : Mission Control Centre
MCDU : Maintenance and Control Display Unit
MCDU : Multi-Function Control and Display Unit (part of FMS)
MCDU : Multi-purpose Control and Display Unit (ACARS)
MCE : Management Centre Europe (seminars/courses)
MCF : Manning Calculation Formula
MCG : Maastricht Co-ordination Group
MCG : Minimum Climb Gradient
MCH : Modified Cooper-Harper rating scale for system workload assessment
MCMG : Military Committee Meteorological Group
MCP : Management Control Point
MCP : Mode Control Panel (pilots’ interface to the autoflight system; usually located centrally just below
cockpit glare shield)
MCS : Master Control Station
MCS : Monitoring and Control System
MCS : Multi-Aircraft Cockpit Simulator
MCSG : Military Committee Staff Group
MCT : Maastricht Co-ordination Team
MCW : Modulated Continuous Wave
MCT : Maximum Continuous Thrust
MCTR : Military CTR
MCU : Main CWP-Unit
MCU : Modular Concept Unit (Spitzer)
MCU : Minimum Configuration Unit
MCU : Modular Component Unit
MD : Moldova (ISO Country Code)
MD : McDonnell-Douglas
MDA : McDonnell-Douglas Aerospace
MDA/H : Minimum Descent Altitude/Height
MDAU : Maintenance Data Acquisition Unit
MDCN : Military Diplomatic Clearance Number; for military aircraft
MDD : Meteorological Data Distribution (function)
MDF : Main Distribution Frame
MDF : Medium Frequency direction-finding Station
MDH : Minimum descent Height
MDI : Manage Document Inputs
MDI : Minimum Departure Interval
MDL Multipurpose Data Link
MDP : Maastricht Development Plan
MDP : MADAP Data Processor
MDS : Management Document Storage
MDS : Minimum Detectable Signal
MDT : Mean Down Time
MEA : Minimum En-route Altitude (ICAO)
MEB : Main Earthing Bar
MECA : Model for the Economical evaluation of the Capacities of the ATM system
MECO : Main Engine Cutoff
MECU : Millons of ECU
MEHT : Minimum eye height over threshold (for visual
approach slope indicator system)
MED : Medium
MEDLL : Multipath Delay Lock Loop
MEF : Minimum Essential Facilities
MEFISTO : Modelling, Evaluating and Formalising
Interactive Systems using Tasks and Interaction Objectives
MEG : Magnetoencephalography
MEL : Minimum En-route Level
MEL : Minimum Equipment List
MEMPAC : CBT on Memory, Perception, Cognition and Attention
MEO : Medium Earth Orbit
MES : Mobile Earth Station
MET : Meteorological or request METAR
MET : Meteorological (office)
MET/AIS : Meteorological and Aeronautical Information
processing System
METAR : Aviation Routine Weather Report
METAR : Meteorological Aerodrome Report
METAR : Meteorological Aviation Routine Weather Report / Actual Report
MEURO : Millions of EURO
MF : Manning Factor
MF : Medium Frequency
MF : Metering Fix
MF : Multiplication Factor
MFA : Message Format Area
MFAL : Major Functional Areas List
MFC : Multi-Frequency Coding (telephone system)
MFC/LB : Multi-Frequency Coding / Local Battery
MFD : Multi Function Display
MFDA : Military Flight Data Assistant
MFL : Military Flight List
MFLOPS : Million Floating Point Operations per Second
MFPU : Mobile Field Processing Unit
MFS : Message from Shanwick
MFUR : Most Frequently Used route
MGC : Main Graphics Controller
MGT : Management
MGV : Miss Generation Volume
MH : Malaysia Airlines (airline)
MHDF : Medium and high frequency direction-finding station (at the same location)
MHRS :Magnetic Heading Reference System
MHS : Message Handling Service
MHT : Multi Head Tracking
MHT : Multi Hypothesis Technique
MHVDF : Medium, high and very high frequency directionfinding station (at the same location)
Mhz : Megahertz
MI : Shallow (meteo)
MIB : Management Information Base
MIC : Microphone (VCS)
MICAM : Military Code Allocation Method
MID : Mid-point (related to RVR)
MID : Middle-East Region (ICAO) / Moyen-Orient
MIDAS : Man-machine Integration Design analysis System
MIDAS Multi-discipline Data Analysis System
MIDS : Multi-Function Information Distribution System
MIF : MTI Improvement Factor
MIFG : Shallow fog
MIG : Mikojan - Gurevich
MIL : Military
MILATCC : Military Air Traffic Control Centre
MILE : Multiple Integrated Laser Engagement System
MIL-HDBK : Military Handbook
MILREP : Military Representation
MILSATCOM : Military Satellite Communications
MILSPEC Military Specifications
MIL-STD : Military Standard
MIN : Message Identification Number
min : minutes
MIN : Minimum
MINIT : Minutes in Trail. A specified interval between aircraft expressed in time
MINIPLN : Set of Flight plan related information provided by an FPPS to an ARTAS Unit, used for track labelling
MINLINEUP : Minimum time to line-up for take-off
MIO : Military Sector Input Operator
MIP : Multinational Information Production
MIPS : Million Instructions per Second
MIR : Master Inspection Record
MIRACULIX : Multi Interface Radarformat Calculator and User Line Information Exchange
MIRL : Medium Intensity Runway Lights
MIS : Management Information Service/Systems User
MIS : Management Information System
MIS : Manual Input Station
MIT : Miles in Trail. A specified interval between aircraft
expressed in nautical miles.
MITRE : Massachusetts Institute for Technology, Research
and Engineering
MIW : Message In Window
MK : Macedonia (ISO Country Code)
MKR : Marker Radio Beacon
MLD : Military Liaison Division
MLDT : Mean Logistic Down Time
MLA : ManeuverLimited Altitude
MLE : Landing Gear Extended Placard Mach Number
MLS : Microwave Landing System
MM : Mental Model
MM : Middle Marker
mm : Millimetre
MMEL : Master Minimum Equipment List
MMI : Man-Machine Interface. See HMI
MMIL : Martin-Marietta International Link
MMO : Main Meteorological Office
MMO : Mach Max Operating
MMOC : Martin-Marietta Overseas Corporation
MMPI : Minnesota Multi-phasic Personality Inventory
MMR : Multi-Mode Receiver
MN Magnetic North
MNC : Major NATO Commander
MNCC : Multinational Coordination Centre
MNM : Minimum
MNPS : Minimum Navigation Performance Specification
MNPSA : Minimum Navigation Performance Specification Airspace
MNS : Mobile Network Services
MNT : Mach Number Technique
MNT : Monitor, Monitoring, or Monitored
MNTN : Maintain
MNWG : Multi-national Working Group
MOA : Memorandum of Agreement
MOA : Militairy Operating Area
MOB : Mobile
MOC : Memorandum of Co-operation
MOC : Minimum Obstacle/Obstrucion Clearance (required)
MOCA Minimum Obstruction Clearance Altitude
MOCBITE : Maastricht Operational Computer Based
Information, Training and Examination System
MOD : Ministry of Defence
MOD : Moderate (used to indicate the intensity of weather phenomena, interference or static reports e.g. MOD RA = moderate rain)
MOD : Modified/Modification
Mode S Type of secondary surveillance radar (SSR) equipment which provides Mode A and Mode C
interrogations, discrete address (Mode S) interroga tions from the ground or air, and a data link capability
MODIS Moderate-resolution Imaging Spectrometer
MoF : Minister of Finance
MOF : Mode of Flight
MOGAS : Motor Gasoline
MON : Above Mountains
MON : Centre of Expertise Monitoring
MONA : Monitoring Aids
MONA User : Monitoring Aids User
MOPS : Minimum Operational Performance Standards (Specifications) / FAA
MOR : Military Operational Requirements
MORS : Mandatory Occurrence Reporting Scheme
MOS : Minimum Operating Standard
MOS : Minimum Operating Strip
MOSD : Mission, Objectives and Strategy Document
MOT : Ministry of Transport
MOT&E : Multinational Operational Testing and Evaluation
MOTNE : Meteorological Operational Telecommunications Network Europe
MOU, MoU : Memorandum of Understanding
MOUSES, MOUSES TF : Mode S Operational Use of Enhanced Surveillance Task Force
MOV : Move or Moving or Movement
MOW : Message Out Window
MOX (-B) : Maastricht Operational Telephone Exchange (version B)
MP : Manpower Planning
MP : Martinair (airline)
MP : Mental Picture
Mp : Microprocessor
MPa : Maximum Tyre Pressure Allowable
MPA : Maritime Patrol aircraft
MPA : Military Planning Assistant
MPC : Message Processing Centre
MPC : Military Planning Controller
MPDR : Medium Powered Doppler Radar
MPEG : Moving Pictures Expert Group
MPH : Statute Miles per Hour
MPL : Mini Flight Plan
MPO : Maastricht Project Office
MPO : Management Project Office
MPR : Medium Powered Radar
MPR : Swedish National Board for Measurement and Testing
MPRT : Menu Preview Response Time
MPS : Meters per Second
MPW : Maximum Possible Weight
MPS / MPSG : Manpower Planning Sub-Group
MPs : Manpower Planners
MPS : Minimum Performance Specification
MP-SEC : Management Planning System Evaluation and Control
MPT : Minimum Performance Transponder
MPX : Multiplex (Transmission)
MRA : Military Reserved Airspace
MRA : Minimum Reception Altitude
MRC : Military Radar Controller
MRC : Monitoring and Remote Control
MRCA : Multirole Combat Aircraft
MRDP : Multi Radar Data Processing
MRDPS : Multi Radar Data Processing System
MRDV : Multi Radar Daten Verarbeitung / Multi-Radar Processing System
MRG : Medium Range
MRI : Master Record Index (MAS - ODS)
MRK : Marker (RLB)
MRL : Minimum Risk Level
MRM : Minimum Required Manoeuvre (OCD)
MRP : ATIS/MET Reporting Point
MRRP : Minimum Risk Routing Point
MRS : Monitoring and Ranging Stations
MRSA : Mandatory Radar Service Area
MRT : Mean Response Time
MRT : Monitoring R/T, an ACM service message
MRT : Multi Radar Tracking
MRTS : Multi Radar Tracker and Server (System)
MRT-VU : Multi Radar Tracking using Variable Update
MRU : Projekt Marknadsföring Rekrytering Urval och Utbildning (SE) / Project for marketing, recruitment,
selection and training for ATCO students, in Sweden MRVA : Minimum Radar Vectoring Altitude
ms : millisecond
MS : Egypt Air (airline)
MS : Minus
MSA : Minimum Safe/Sector Altitude
MSAS : MTSAT Satellite Based Augmentation System
MSAW : Minimum Safe Altitude Warning
MSB : CFMU – Management Support Bureau
MSB : Most Significant Bit
MSC : Maastricht Steering Committee
MSC : Meteorological Services Communication
MSC : Miscellaneous Simulation Facility
MS-DTS : Medium Speed-Data Transmission System
MSF : Master Simulation Facility
MSG : Manpower Sub-Group
MSG : Message
MSGDLP : Mode S Ground Data Link Processor
MSGSUM : Message Summary
MSGTXT : Message Text
MSK : Minimum Shift Keying
MSL : Mean Sea Level
MSP : Mode S Specific Protocol
MSP : Multi-sector planning
MSRT : Mean Services Restoration Time
MSS : Message Storage System
MSSA : Message Switching System
MSSR : Monopulse Secondary Surveillance Radar
MST : Multiple Sensor Tracking
MSTU : Multiple Stagger Trigger Unit
MSU : Management Storage Unit
MSU : Mode Select Unit
MSUP : Military SUPervisor
MT : Malta (ISO Country Code)
MT : Mountain
MTA : Military Training Area
MTAC : Multiple Time Around Clutter
MTAT : Multiple Time Around Targets
MTBCF : Mean Time Between Critical Failures
MTBF : Mean Time Between Failures
MTBR : Mean Time Between Removals
MTBUR : Mean Time Between Unscheduled Removal
MTCA : Medium Term Conflict Alert / Assistance (ODID)
MTCD : Medium Term Conflict Detection
MTCDR : Medium-Term Conflict Detection and Resolution
MTCEP : (Short) & Medium Term Capacity Enhancement Plan
MTD : Mean Down Time
MTD : Micro Tabular Display
MTD : Moving Target Detection
MTF : Modulation Transfer Function
MTI : Moving Target Indicator
MTMA : Major TMA
MTN : Mega Transport Network
MTOM : Maximum Take-Off Mass
MTOW : Maximum Take-Off Weight
MTP : Medium Term Plan
MTPA : Mobile Transponder Performance Analyser
Mtraq : Multi track quality
MTS : Manoeuvrable Target Simulator
MTS : Memory Time Switch (ACS)
MTSAT : Multi-Functional Transport Satellite
MTTF : Mean Time To Failure
MTTR : Mean Time To Repair (CBN - CNG)
MTTRlru : Mean Time to repair LRU
MTTRp : Mean Time to repair product
MTTRsru : Mean Time to repair SRU
MTU : Master Trigger Unit
MTU : Metric Units
MTW : Mountain Waves
MTWA : Maximum take-off Weight Authorized
MU : Management Unit (ACARS)
MU : Mu Meters
MUAC : Military Upper Area Control (Centre)
MUD : Mud
MUDPIE : Multiple User Data Processing Interactive Environment
MUNI : Municipal
MURATREC : Multi Radar Track Reconstruction (System)
MUSAC : Multiple Switching and Confirming (VCS)
MUT : Mean Up Time
MUX : Multiplex
MVDF : Medium and very high frequency direction-finding
station (at the same location)
MVE : Move
MW : Megawatt
MW : Microwave link
mW : Milliwatt
MWA : Message Warning Area
MWO : Meteorological Watch Office
MWP : Meteorological Working Position
MWP Meteorological Weather Processor
MWT(A) : Mean Waiting Time, Administrative
MWW : Upper Wind and Temperature Forecast (message)
MX : Mixed type of ice formation (white and clear)
MXCOP : MADAP Exit Co-ordination Point
MXFL : MADAP Exit Flight Level














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