Pilot/Controller Glossary

GATE HOLD PROCEDURES- Procedures at
selected airports to hold aircraft at the gate or other
ground location whenever departure delays exceed or
are anticipated to exceed 15 minutes. The sequence
for departure will be maintained in accordance with
initial call-up unless modified by flow control
restrictions. Pilots should monitor the ground
control/clearance delivery frequency for engine
start/taxi advisories or new proposed start/taxi time
if the delay changes.
GBT-
(See GROUND-BASED TRANSCEIVER.)

GCA-
(See GROUND CONTROLLED APPROACH.)

GDP-
(See GROUND DELAY PROGRAM.)

GENERAL AVIATION- That portion of civil
aviation that does not include scheduled or
unscheduled air carriers or commercial space
operations.
(See ICAO term GENERAL AVIATION.)

GENERAL AVIATION [ICAO]- All civil aviation
operations other than scheduled air services and
nonscheduled air transport operations for remuneration or hire.
GEO MAP- The digitized map markings associated
with the ASR-9 Radar System.
GLIDEPATH-
(See GLIDESLOPE.)

GLIDEPATH [ICAO]- A descent profile determined
for vertical guidance during a final approach.
GLIDEPATH INTERCEPT ALTITUDE-
(See GLIDESLOPE INTERCEPT ALTITUDE.)

GLIDESLOPE- Provides vertical guidance for
aircraft during approach and landing. The glideslope/
glidepath is based on the following:
a. Electronic components emitting signals which
provide vertical guidance by reference to airborne
instruments during instrument approaches such as
ILS; or,

b. Visual ground aids, such as VASI, which
provide vertical guidance for a VFR approach or for
the visual portion of an instrument approach and
landing.
c. PAR. Used by ATC to inform an aircraft making
a PAR approach of its vertical position (elevation)
relative to the descent profile.
(See ICAO term GLIDEPATH.)

GLIDESLOPE INTERCEPT ALTITUDE- The
published minimum altitude to intercept the
glideslope in the intermediate segment of an
instrument approach. Government charts use the
lightning bolt symbol to identify this intercept point.
This intersection is called the Precise Final Approach
fix (PFAF). ATC directs a higher altitude, the
resultant intercept becomes the PFAF.
(See FINAL APPROACH FIX.)
(See SEGMENTS OF AN INSTRUMENT
APPROACH PROCEDURE.)

GLOBAL NAVIGATION SATELLITE SYSTEM
(GNSS) [ICAO]- GNSS refers collectively to the
worldwide positioning, navigation, and timing
determination capability available from one or more
satellite constellation in conjunction with a network
of ground stations.
GLOBAL NAVIGATION SATELLITE SYSTEM
MINIMUM EN ROUTE IFR ALTITUDE (GNSS
MEA)- The minimum en route IFR altitude on a
published ATS route or route segment which assures
acceptable Global Navigation Satellite System
reception and meets obstacle clearance requirements.
(Refer to 14 CFR Part 91.)
(Refer to 14 CFR Part 95.)
GLOBAL POSITIONING SYSTEM (GPS)- GPS
refers to the worldwide positioning, navigation and
timing determination capability available from the
U.S. satellite constellation. The service provided by
GPS for civil use is defined in the GPS Standard
Positioning System Performance Standard. GPS is
composed of space, control, and user elements.
GNSS [ICAO]-
(See GLOBAL NAVIGATION SATELLITE
SYSTEM .)