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Pilot/Controller Glossary

3/29/18

PCG M−6

ridge of a sharp bluff area. As the air hits the upwind

side of the range, it starts to climb, thus creating what

is generally a smooth updraft which turns into a

turbulent downdraft as the air passes the crest of the

ridge. Mountain waves can cause significant

fluctuations in airspeed and altitude with or without

associated turbulence.

(Refer to AIM.)

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.)

Pilot/Controller Glossary

9/13/18