U.S. DEPARTMENT OF TRANSPORTATION
FEDERAL AVIATION ADMINISTRATION
Air Traffic Organization Policy

ORDER
JO 7340.2E
Effective Date:
July 24, 2014
 
     

Subject:  Contractions
   
Includes Change 1 dated 11/13/14

[Back to Section 2. Encode]

M

Definition

Contraction

Usage

Mach number

M

GEN

MACH Number (speed ratio to speed of sound)

MACH

ATC

Mackay Radio and Telegraph Company

MACKAY

GEN

magnetic

MAG

GEN

magnetic bearing

QDR

ICAO

magnetic heading

MHDG

GEN

magnetic heading

QDM

ICAO

magnetic orientation of runway

QFU

ICAO

magnetic variation

VAR

ICAO

main meteorological office

MMO

NWS

mainland

MNLD

NWS

mainly

MNLY

GEN

maintain

MNTN

ICAO

maintain a position VFR and advise

MPVA

ATC

maintain at least (altitude)

MAL

ATC

maintain flight level

MFL

ATC

maintain Mach

MMACH

ATC

maintain VFR

MVFR

ATC

maintain visual separation

MVSP

ATC

maintain well to right of course

MWRC

ATC

maintaining visual flight (Special VFR)

VF

ATC

maintenance

MAINT

ICAO

maintenance assumes monitor

MAM

GEN

maintenance check

MCK

GEN

maintenance returns monitor

MRM

GEN

make altitude changes VFR

MACVFR

ATC

make check turn

MKCT

ATC

make descent from

MDFR

ATC

make good a magnetic track of (degrees)

MGMT

ATC

make good a track of (degrees)

MGAT

ATC

management

MGMT

GEN

manager

MGR

GEN

maneuver

MNVR

GEN

Manitoba

MAN

NWS

manual

MAN

GEN

manual A1 simplex

MAS

ICAO

manual amendment

MANAM

GEN

manual of operations

MANOP

GEN

manufacturing inspector

MI

GEN

map analysis

MA

NWS

marginal

MRGL

NWS

marginal VFR

MVFR

NWS

Marine Corps Air Station

MCAS

GEN

Marine Corps Air Station (Helicopter)

MCAS(H)

GEN

maritime

MRTM

NWS

maritime (air mass)

M

NWS

marked

MKD

GEN

marker

MKR

GEN

marker beacon

MB

GEN

marker radio beacon

MKR

ICAO

Master Control Station

MCS

ATC

master flight plan on file

MFPOF

ATC

material

MTRL

GEN

maximum

MAX

GEN

maximum authorized (IFR) altitude

MAA

GEN

maximum usable altitude

MUA

GEN

maximum usable frequency

MUF

GEN

meaconing, intrusion, jamming, interference

MIJI

ATC

mean sea level

MSL

ICAO

mechanic

MECH

GEN

mechanical reliability report

MRR

GEN

medical

MED

GEN

medical emergency evacuation

MEDEVAC

ICAO

medium

MED

GEN

medium and high frequency direction­finding station (same location)

MHDF

ICAO

medium and very high frequency direction­finding station (same location)

MVDF

ICAO

medium frequency

MF

GEN

medium frequency direction finding station

MDF

ICAO

medium high and very high frequency direction­finding station (same location)

MHVDF

ICAO

medium intensity approach lighting system

MALS

GEN

medium intensity approach lighting system with runway alignment indicator lights

MALSR

GEN

medium intensity approach lighting system with sequenced flashers

MALSF

GEN

medium intensity runway edge lights

MIRL

GEN

medium range

MRG

GEN

megahertz

MHz

GEN

melting level

MLTLVL

NWS

memorandum of agreement

MOA

GEN

memorial

MEML

GEN

merging

MEGG

NWS

Merit Promotion Program

MPP

GEN

message

MSG

ICAO

Message …(transmission identification) has been misrouted

MSR

ICAO

message center

MSGCTR

GEN

meteorological

MET

GEN

Meteorological Aeronautical Presentation System

MAPS

GEN

meteorological information for aircraft in flight

VOLMET

ICAO

meteorological officer

METOF

GEN

Meteorological Operational Telecommunications Network Europe

MOTNE

ICAO

Meteorological Watch Office

MWO

ICAO

meter fix time

MFXT

ATC

meters per second

MPS

ICAO

metres (preceded by figures)

M

ICAO

metric units

MTU

ICAO

metropolitan

METRO

GEN

Mexico

MEX

NWS

microwave landing system

MLS

GEN

Mid­Canada Identification Zone

MIDIZ

GEN

middle

MID

GEN

middle marker

MM

ICAO  

midnight

MIDN

NWS

midpoint

MIDPT

GEN

mid­point (related to RVR)

MID

ICAO

Mike Monroney Aeronautical Center, FAA

AAC

GEN

mile

MI

GEN

miles in trail

MIT

ATC

miles per hour

MPH

GEN

military

MIL

ICAO 

Military Airlift Command

MAC

GEN

military alert system

MAS

GEN

military assumes responsibility for separation of aircraft

MARSA

GEN

military, customs, or police services

STATE

ICAO

military flight service

MFS

GEN

military height finder radar

MHFR

GEN

military operations area

MOA

ICAO  

Military Radar Unit

MRU

GEN

military training route

MTR

GEN

millibars

MB

GEN

millimeter

MM

GEN

millivolt

MV

GEN

mimeographic notice

MIMNO

GEN

minimum

MNM

ICAO

minimum altitude at glide slope intersection inbound

MAGSI

GEN

minimum altitude over facility on final approach course

MAFAP

ATC

minimum crossing altitude

MCA

ICAO

minimum descent altitude

MDA

ICAO  

minimum descent height

MDH

ICAO

minimum en route altitude

MEA

ICAO  

minimum eye height over threshold

MEHT

ICAO

minimum fuel on board

MFOB

ATC

minimum holding altitude

MHA

GEN

minimum interval take­off

MITO

ATC

minimum navigation performance specification

MNPS

ATC

minimum navigation performance specification airspace

MNPSA

ATC

minimum obstacle clearance (required)

MOC

ICAO

minimum obstruction clearance altitude

MOCA

ICAO

Minimum operational performance standards

MOPS

ICAO

minimum reception altitude

MRA

GEN

minimum requirements specified

MIREQ

GEN

minimum safe altitude warning

MSAW

GEN

minimum safe/sector altitude

MSA

GEN

minimum terrain clearance altitude

MTCA

GEN

minimum vector altitude

MVA

GEN

minimum when control zone effective

MCZNE

GEN

Ministry of Transport (Canada)

MOT

GEN

minus

MS

NWS

minute

MIN

ICAO  

minutes in trail

MINIT

ATC

miscellaneous

MISC

GEN

missed approach point

MAP

GEN

missed approach point

MAPT

ICAO

missile

MISL

GEN

missing

MISG

GEN

missing (weather reports only)

M

NWS

Missing …(transmission identification)

MIS

ICAO

mist

BR

METAR

mixed

MXD

NWS

moderate

MDT

GEN

moderate

MOD

GEN

moderate or greater

MOGR

NWS

modernization

MDZN

GEN

modernize

MDZ

GEN

modernized weather teletypewriter communications system

MWTCS

GEN

modify

MDFY

GEN

modulate or modulation or modulator

MOD

GEN

modulated continuous wave

MCW

ICAO

Mohawk Valley

MHKVLY

NWS

moisture

MSTR

NWS

momentary

MTRY

GEN

monitor

MNT

ICAO

monitor

MONTR

NWS

monitor out of service

MONOS

GEN

monitor resumed normal operation

MONOK

GEN

monitor station reports

MOREPS

GEN

Monopulse secondary surveillance radar

MSSR

ICAO

morning

MRNG

NWS

mostly

MSTLY

NWS

mountain

MT

ICAO

mountain

MTN

NWS

Mountain Standard Time (time groups only)

M

NWS

mountain wave

MTW

ICAO

move

MOV

NWS

moving target indicator

MTI

ATC

multi­object phase tracking and ranging

MOPTAR

GEN

multiple

MULT

GEN

municipal

MUNI

GEN

municipal airport

MARPT

GEN

must ride company material

RIMAT

GEN

 

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