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G
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.
(See FLOW
CONTROL.)
GCA-
(See GROUND CONTROLLED
APPROACH.)
GENERAL AVIATION-
That portion of civil aviation which encompasses all facets of
aviation except air carriers holding a certificate of public
convenience and necessity from the Civil Aeronautics Board and large
aircraft commercial operators.
(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/MLS, 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 minimum altitude to intercept the
glideslope/path on a precision approach. The intersection of the
published intercept altitude with the glideslope/path, designated on
Government charts by the lightning bolt symbol, is the precision FAF;
however, when the approach chart shows an alternative lower glideslope
intercept altitude, and ATC directs a lower altitude, the resultant
lower intercept position is then the FAF.
(See
FINAL APPROACH FIX.)
(See SEGMENTS OF AN INSTRUMENT APPROACH PROCEDURE.)
GLOBAL
POSITIONING SYSTEM (GPS)- A space-base radio positioning,
navigation, and time- transfer system. The system provides highly
accurate position and velocity information, and precise time, on a
continuous global basis, to an unlimited number of properly equipped
users. The system is unaffected by weather, and provides a worldwide
common grid reference system. The GPS concept is predicated upon
accurate and continuous knowledge of the spatial position of each
satellite in the system with respect to time and distance from a
transmitting satellite to the user. The GPS receiver automatically
selects appropriate signals from the satellites in view and translates
these into three-dimensional position, velocity, and time. System
accuracy for civil users is normally 100 meters horizontally.
GO AHEAD-
Proceed with your message. Not to be used for any other purpose.
GO AROUND-
Instructions for a pilot to abandon his/her approach to landing.
Additional instructions may follow. Unless otherwise advised by ATC, a
VFR aircraft or an aircraft conducting visual approach should overfly
the runway while climbing to traffic pattern altitude and enter the
traffic pattern via the crosswind leg. A pilot on an IFR flight plan
making an instrument approach should execute the published missed
approach procedure or proceed as instructed by ATC; e.g., "Go around"
(additional instructions if required).
(See LOW
APPROACH.)
(See
MISSED APPROACH.)
GPD-
(See GRAPHIC PLAN DISPLAY.)
GPS-
(See GLOBAL POSITIONING
SYSTEM.)
GRAPHIC PLAN
DISPLAY (GPD)- A view available with URET CCLD that provides a
graphic display of aircraft, traffic, and notification of predicted
conflicts. Graphic routes for Current Plans and Trial Plans are
displayed upon controller request.
(See USER REQUEST EVALUATION TOOL CORE CAPABILITY LIMITED DEPLOYMENT.)
GROUND CLUTTER- A
pattern produced on the radar scope by ground returns which may
degrade other radar returns in the affected area. The effect of ground
clutter is minimized by the use of moving target indicator (MTI)
circuits in the radar equipment resulting in a radar presentation
which displays only targets which are in motion.
(See CLUTTER.)
GROUND
COMMUNICATION OUTLET (GCO)- An unstaffed, remotely controlled,
ground/ground communications facility. Pilots at uncontrolled airports
may contact ATC and FSS via VHF to a telephone connection to obtain an
instrument clearance or close a VFR or IFR flight plan. They may also
get an updated weather briefing prior to takeoff. Pilots will use four
"key clicks" on the VHF radio to contact the appropriate ATC facility
or six "key clicks" to contact the FSS. The GCO system is intended to
be used only on the ground.
GROUND
CONTROLLED APPROACH- A radar approach system operated from the
ground by air traffic control personnel transmitting instructions to
the pilot by radio. The approach may be conducted with surveillance
radar (ASR) only or with both surveillance and precision approach
radar (PAR). Usage of the term "GCA" by pilots is discouraged except
when referring to a GCA facility. Pilots should specifically request a
"PAR" approach when a precision radar approach is desired or request
an "ASR" or "surveillance" approach when a nonprecision radar approach
is desired.
(See
RADAR APPROACH.)
GROUND DELAY- The amount
of delay attributed to ATC, encountered prior to departure, usually
associated with a CDT program.
GROUND SPEED- The speed
of an aircraft relative to the surface of the earth.
GROUND STOP- Normally,
the last initiative to be utilized; this method mandates that the
terminal facility will not allow any departures to enter the ARTCC
airspace until further notified.
GROUND VISIBILITY-
(See
VISIBILITY.)
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