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established as follows:
1. Minimum Sector Altitudes. Altitudes depicted
on approach charts which provide at least
1,000 feet of obstacle clearance within a 25-mile
radius of the navigation facility upon which the
procedure is predicated. Sectors depicted on approach
charts must be at least 90 degrees in scope.
These altitudes are for emergency use only and do not
necessarily assure acceptable navigational signal
coverage.
(See ICAO term Minimum Sector Altitude.)
2. Emergency Safe Altitudes. Altitudes depicted
on approach charts which provide at least
1,000 feet of obstacle clearance in nonmountainous
areas and 2,000 feet of obstacle clearance in designated
mountainous areas within a 100-mile radius of
the navigation facility upon which the procedure is
predicated and normally used only in military
procedures. These altitudes are identified on published
procedures as “Emergency Safe Altitudes.”
MINIMUM SAFE ALTITUDE WARNING− A
function of the ARTS III computer that aids the
controller by alerting him/her when a tracked Mode
C equipped aircraft is below or is predicted by the
computer to go below a predetermined minimum safe
altitude.
(Refer to AIM.)
MINIMUM SECTOR ALTITUDE [ICAO]− The
lowest altitude which may be used under emergency
conditions which will provide a minimum clearance
of 300 m (1,000 feet) above all obstacles located in
an area contained within a sector of a circle of 46 km
(25 NM) radius centered on a radio aid to navigation.
MINIMUMS− Weather condition requirements established
for a particular operation or type of
2/17/05 Pilot/Controller Glossary
PCG M−5
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− 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 between
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.)
MLS−
(See MICROWAVE LANDING SYSTEM.)
MLS CATEGORIES−
a. MLS Category I. An MLS 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.
b. MLS Category II. Undefined until data gathering/
analysis completion.
c. MLS Category III. Undefined until data gathering/
analysis completion.
MM−
(See MIDDLE MARKER.)
MNPS−
(See MINIMUM NAVIGATION PERFORMANCE
SPECIFICATION.)
　
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