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.
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.
GRAPHICAL AIRMEN"S METEOROLOGICAL INFORMATION-A graphical depiction of weather that
may be hazardous to aircraft, but are less severe than SIGMETs. G-AIRMETS are issued 3 hours apart for a
period of up to 12 hours into the future for the lower 48 states and coastal waters. The weather hazards depicted
can be:
a. Moderate turbulence
b. Low-level windshear
c. Strong surface winds greater than 30 knots
d. Moderate icing
e. Freezing level
f. Mountain obscuration
g. IFR
(See AIRMET.)
(See CONVECTIVE SIGMET.)
(See CWA.)
(See SAW.)
(See SIGMET.)
(Refer to AIM.)

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,