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MNPSA−
(See MINIMUM NAVIGATION PERFORMANCE−
SPECIFICATION AIRSPACE.)
MOA−
(See MILITARY OPERATIONS AREA.)
MOCA−
(See MINIMUM OBSTRUCTION CLEARANCE
ALTITUDE.)
MODE− 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
Pilot/Controller Glossary 2/17/05
PCG M−6
System (ATCRBS). Mode A (military Mode 3) and
Mode C (altitude reporting) are used in air traffic
control.
(See INTERROGATOR.)
(See RADAR.)
(See TRANSPONDER.)
(See ICAO term MODE.)
(Refer to AIM.)
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 specified in Annex 10,
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 IFR or
VFR aircraft) and an untracked target (unknown IFR
or VFR aircraft) that requires 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.
MONITOR ALERT (MA)− A function of the ETMS
that provides traffic management personnel with a
tool for predicting potential capacity problems in
individual operational sectors. The MA is an indication
that traffic management personnel need to
analyze a particular sector for actual activity and to
determine the required action(s), if any, needed to
control the demand.
MONITOR ALERT PARAMETER (MAP)− The
number designated for use in monitor alert processing
by the ETMS. The MAP is designated for each
operational sector for increments of 15 minutes.
MOVEMENT AREA− The runways, taxiways, and
other areas of an airport/heliport which are utilized
for taxiing/hover taxiing, air taxiing, takeoff, and
landing of aircraft, exclusive of loading ramps and
parking areas. At those airports/heliports with a
tower, specific approval for entry onto the movement
area must be obtained from ATC.
(See ICAO term MOVEMENT AREA.)
MOVEMENT AREA [ICAO]− That part of an
aerodrome to be used for the takeoff, landing and
taxiing of aircraft, consisting of the maneuvering area
and the apron(s).
MOVING TARGET INDICATOR− An electronic
device which will permit radar scope presentation
only from targets which are in motion. A partial
remedy for ground clutter.
MRA−
(See MINIMUM RECEPTION ALTITUDE.)
MSA−
(See MINIMUM SAFE ALTITUDE.)
MSAW−
(See MINIMUM SAFE ALTITUDE WARNING.)
MTI−
(See MOVING TARGET INDICATOR.)
MTR−
(See MILITARY TRAINING ROUTES.)
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.
MULTIPLE RUNWAYS− The utilization of a dedicated
arrival runway(s) for departures and a dedicated
departure runway(s) for arrivals when feasible to
reduce delays and enhance capacity.
MVA−
(See MINIMUM VECTORING ALTITUDE.)
2/17/05 Pilot/Controller Glossary
PCG N−1
N
NAS−
(See NATIONAL AIRSPACE SYSTEM.)
NAS STAGE A− The en route ATC system’s radar,
computers and computer programs, controller plan
view displays (PVDs/Radar Scopes), input/output
devices, and the related communications equipment
which are integrated to form the heart of the
automated IFR air traffic control system. This
equipment performs Flight Data Processing (FDP)
and Radar Data Processing (RDP). It interfaces with
automated terminal systems and is used in the control
of en route IFR aircraft.
(Refer to AIM.)
NATIONAL AIRSPACE SYSTEM− The common
network of U.S. airspace; air navigation facilities,
equipment and services, airports or landing areas;
aeronautical charts, information and services; rules,
regulations and procedures, technical information,
and manpower and material. Included are system
components shared jointly with the military.
NATIONAL BEACON CODE ALLOCATION
PLAN AIRSPACE− Airspace over United States
　
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