FINAL APPROACH SEGMENT The segment of an instrument approach between the FAF
and the MAP.
FIX A geographical position determined by reference to one or more radio NAVAIDS. A fix
can be defined as the actual location of the NAVAID, a distance and radial from a NAVAID, or
the crossing point of two different radials from two different NAVAIDS.
FLIGHT PLAN Specified information provided to air traffic control facilities, relative to the
intended flight of an aircraft.
FLIGHT SERVICE STATION (FSS) A facility operated by the FAA to provide flight
GROUND CONTROLLED APPROACH (GCA) A Radar approach system whereby a
controller interprets a radar display, transmitting approach instructions to the pilot by radio, to
place the aircraft in position for landing. The approach may use airport surveillance radar (ASR)
providing course and range information, or precision approach radar (PAR) providing course,
range, and glideslope information. Usage of the term "GCA" by pilots is discouraged. Pilots
should specifically request a "PAR" or "ASR" approach.
HEADING The direction in which the longitudinal axis of the aircraft is pointed, usually
expressed in degrees magnetic from North.
HEIGHT ABOVE AIRPORT (HAA) The height of the MDA above the published airport
elevation. HAA will be published in conjunction with all circling minimums.
HEIGHT ABOVE TOUCHDOWN (HAT) The height of the DH or MDA above the highest
runway elevation in the touchdown zone. HAT will be published in conjunction with all
IDENT A request for a pilot to activate the aircraft transponder identification feature. This
will help the controller to confirm an aircraft identity or to identify an aircraft.
INITIAL APPROACH FIX (IAF) The fix depicted on an Instrument Approach Procedure
chart that identifies the beginning of the initial approach segment.
INITIAL APPROACH SEGMENT That part of an instrument approach between the Initial
Approach Fix and the intermediate or Final Approach Fix or point.
INITIAL CONTACT The first radio call you make to a given facility or the first call to a
INSTRUMENT APPROACH PROCEDURE (IAP) A series of predetermined maneuvers
for the orderly transfer of an aircraft under instrument flight conditions from the beginning of the
initial approach to a landing or to a point from which a landing may be made visually.