M Abbreviation for: Mach number Fr: M
MA Abbreviation for: missed approach Fr: MA
MAA U.S.: Abbreviation for: maximum authorized altitude
Mach number
The ratio of the speed of an object to the local speed of sound.
. abbreviation: M
Fr: nombre de Mach
Mach number technique The assignment by ATC of Mach number values to aircraft that are in level flight, climbing or descending, to ensure that longitudinal separation is maintained. Fr: technique du nombre de Mach
MAHWP Abbreviation for: missed approach holding waypoint Fr: MAHWP
“Maintain . . .”
(1) Canada: Concerning altitude or flight level (FL), an expression meaning that the aircraft must reach or remain at the altitude or FL specified.
Fr: . Maintenez... .
(2) ICAO and U.S.: An expression meaning “Remain at level specified” or in its literal sense, 
e.g. “Maintain VFR.”
Fr: . Maintenez….
“Make short approach” U.S.: Expression for: “Tighten your approach”
mandatory frequency A very high frequency (VHF) specified in the Canada Air Pilot (CAP) or the Canada Flight Supplement (CFS) for the use of radio-equipped aircraft operating within a mandatory frequency area.
. abbreviation: MF
Fr: fréquence obligatoire
mandatory frequency area An area established at selected uncontrolled aerodromes within which aircraft are required to comply with mandatory-frequency reporting procedures.
. abbreviation: MF area
Fr: zone d’utilisation de fréquence obligatoire
manoeuvring area The part of an aerodrome, other than an apron, that is intended to be used for the takeoff and landing of aircraft and for the movement of aircraft associated with takeoff and landing. Fr: aire de man.uvre
MANOT Abbreviation for: missing aircraft notice Fr: MANOT
MAP Abbreviation for: missed approach point Fr: MAP
marker An object of a conventional shape, flag, or painted sign displayed above ground level (AGL) for the purpose of indicating an obstacle or delineating a boundary. Fr: balise
marker beacon A transmitter in the aeronautical radionavigation service that radiates vertically a distinctive pattern to provide position information to aircraft. Fr: radioborne
master minimum equipment list A document established by the Minister pursuant to CAR 605.07(1) that enumerates the aircraft equipment that is allowed to be unserviceable for a specified type of aircraft under the conditions specified therein.