MISSED APPROACH PROCEDURE (ICAO) - The procedure to be followed if the approach cannot be continued.
MISSED APPROACH SEGMENT - (See Segments of an Instrument Approach Procedure)
MLS - (See Microwave Landing System)
Microwave Landing System Categories -
(1)
MLS CATEGORY I - A Microwave Landing System approach procedure which provides for an approach to a Height Above Touchdown of not less than 200 feet and a Runway Visual Range of not less than 1,800 feet.

(2)
MLS CATEGORY II - Undefined until data gathering/analysis completion.

(3)
MLS CATEGORY III - Undefined until data gathering/analysis completion.

MODE (P/CG) - The letter or number assigned to a specific pulse spacing of radio signals transmitted or received by ground interrogator or airborne transponder components of the Air Traffic Control Radar Beacon System (ATCRBS). Mode A (military Mode 3) and Mode C (altitude report) are used in Air Traffic Control. (See Transponder, Interrogator, Radar)
MODE (IDENT FRIEND OR FOE) (JCS) - The number or letter referring to the specific pulse spacing of the signals transmitted by an interrogator.
MODE (SSR MODE) (ICAO) - The letter or number assigned to a specific pulse spacing of the interrogation signals transmitted by an interrogator. There are 4 modes: A, B, C and D corresponding to four different interrogation pulse spacings.
MODE C INTRUDER ALERT - A function of certain Air Traffic Control automated systems designed to alert radar controllers to existing or pending situations between a tracked target (known Instrument Flight Rules or Visual Flight Rules aircraft) and an untracked target (unknown Instrument Flight Rules or Visual Flight Rules aircraft) that require immediate attention/action. (See Conflict Alert).

MONITOR - (When used with communication transfer) listen on a specific frequency and stand by for instructions. Under normal circumstances do not establish communications.
MOVEMENT AREA (P/CG) - The runways, taxiways, and other areas of an airport/heliport which are utilized for taxiing/hover taxiing, air taxiing, take-off, and landing of aircraft, exclusive of loading ramps and parking areas. At those airport/heliports with a tower, specific approval for entry onto the movement area must be obtained from Air Traffic Control.
MOVEMENT AREA (ICAO) - That part of an airport to be used for the take-off, landing and taxiing of aircraft, consisting of the maneuvering area and the apron(s).
MOVING TARGET INDICATOR/MTI (P/CG) - An electronic device which will permit radar scope presentation only from targets which are in motion. A partial remedy for ground clutter.
MOVING TARGET INDICATOR (JCS, NATO) - A radar presentation which shows only targets which are in motion. Signals from stationary targets are subtracted out of the return signal by the output of a suitable memory circuit.
MSAW - (See Minimum Safe Altitude Warning)
MULTICOM - A mobile service not open to public correspondence used to provide communications essential to conduct the activities being performed by or directed from private aircraft (Federal Air Regulations 87.277).