|
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
|
GEN
|
|
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
|
