MINIMUM FUEL Indicates that an aircraft's fuel supply has reached a state where, upon
reaching the destination, it can accept little or no delay. This is not an emergency situation but
merely indicates an emergency situation is possible should any undue delay occur. The pilot is
not to expect priority handling unless specifically requested or declares "emergency fuel."
MINIMUM HOLDING ALTITUDE (MHA) The lowest altitude prescribed for a holding
pattern which assures navigational signal coverage, communications, and meets obstacle
MINIMUM OBSTRUCTION CLEARANCE ALTITUDE (MOCA) The specified altitude
in effect between radio fixes on VOR airways, offairway routes or route segments, which meets
obstruction clearance requirements for the entire route segment and which assures acceptable
navigational signal coverage only within 25 SM, 22 NM, of a VOR.
MINIMUM RECEPTION ALTITUDE (MRA) The lowest altitude required to receive
adequate signals to determine specific VOR/VORTAC/TACAN fixes.
MINIMUM SAFE ALTITUDE An altitude expressed in 100foot increments providing
1000 feet of clearance over all obstructions/terrain within 25 NM of the navigational aid on
which the instrument approach chart is centered.
MINIMUM SECTOR ALTITUDE Altitude which provides 1000 feet of obstacle clearance
within 25 NM of a NAVAID. It is designated for sectors of at least 90º and found on the
planview of Instrument Approach Procedures. These altitudes are for emergency use only and
do not assure acceptable NAVAID sector coverage.
MINIMUM VECTORING ALTITUDE (MVA) The lowest altitude, (expressed as an MSL
altitude) that aircraft will be vectored by a radar controller. This altitude assures
communications radar coverage and meets obstruction clearance criteria. It may be lower than
MISSED APPROACH A maneuver conducted when an instrument approach cannot be
completed to a landing.
MISSED APPROACH POINT (MAP) A point on an instrument approach at which Missed
Approach Procedures shall be executed if required visual reference does not exist.
NAVAID An electronic device which provides position data to aircraft in flight. NAVAIDS
are normally located at fixed positions on the ground. The NAVAIDS most commonly used by
the T34C are VOR, VORTAC and TACAN aids.
NONPRECISION APPROACH A standard Instrument Approach Procedure in which no
electronic glideslope is provided; e.g., VOR, TACAN, LOC, GPS or ASR approaches.
PRECISION APPROACH A standard Instrument Approach Procedure in which electronic
glideslope/glidepath is provided; e.g., ILS, PAR.