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Aeronautical Information Manual (AIM), page 675

12/10/15 Pilot/Controller Glossary

operation; e.g., IFR takeoff or landing, alternate
airport for IFR flight plans, VFR flight, etc.
(See IFR CONDITIONS.)
(See IFR TAKEOFF MINIMUMS AND
DEPARTURE PROCEDURES.)
(See LANDING MINIMUMS.)
(See VFR CONDITIONS.)
(Refer to 14 CFR Part 91.)
(Refer to AIM.)
MINIMUM VECTORING ALTITUDE (MVA)-

The lowest MSL altitude at which an IFR aircraft will
be vectored by a radar controller, except as otherwise
authorized for radar approaches, departures, and
missed approaches. The altitude meets IFR obstacle
clearance criteria. It may be lower than the published
MEA along an airway or J-route segment. It may be
utilized for radar vectoring only upon the controller's
determination that an adequate radar return is being
received from the aircraft being controlled. Charts
depicting minimum vectoring altitudes are normally
available only to the controllers and not to pilots.
(Refer to AIM.)

MINUTES-IN-TRAIL- A specified interval be-
tween aircraft expressed in time. This method would
more likely be utilized regardless of altitude.

MIS-
(See METEOROLOGICAL IMPACT
STATEMENT.)

MISSED APPROACH-
a. A maneuver conducted by a pilot when an
instrument approach cannot be completed to a
landing. The route of flight and altitude are shown on
instrument approach procedure charts. A pilot
executing a missed approach prior to the Missed
Approach Point (MAP) must continue along the final
approach to the MAP.

b. A term used by the pilot to inform ATC that
he/she is executing the missed approach.

c. At locations where ATC radar service is

provided, the pilot should conform to radar vectors

when provided by ATC in lieu of the published

missed approach procedure.

(See MISSED APPROACH POINT.)
(Refer to AIM.)

MISSED APPROACH POINT- A point prescribed
in each instrument approach procedure at which a

missed approach procedure shall be executed if the
required visual reference does not exist.
(See MISSED APPROACH.)
(See SEGMENTS OF AN INSTRUMENT
APPROACH PROCEDURE.)
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.)

MLDI-
(See METER LIST DISPLAY INTERVAL.)
MM-
(See MIDDLE MARKER.)

MNPS-
(See MINIMUM NAVIGATION PERFORMANCE
SPECIFICATION.)
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
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

PCG M-5

Page 675 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   674 -- Page 675 -- 676