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Plans are displayed upon controller request.
(See USER REQUEST EVALUATION TOOL.)
GROUND-BASED TRANSCEIVER (GBT)- The
ground-based transmitter/receiver (transceiver) receives
automatic dependent surveillance-broadcast
messages, which are forwarded to an air traffic
control facility for processing and display with other
radar targets on the plan position indicator (radar
display).
(See AUTOMATIC DEPENDENT
SURVEILLANCE‐BROADCAST.)
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 PROGRAM (GDP)- A traffic
management process administered by the ATCSCC;
when aircraft are held on the ground. The purpose of
the program is to support the TM mission and limit
airborne holding. It is a flexible program and may be
implemented in various forms depending upon the
needs of the AT system. Ground delay programs
provide for equitable assignment of delays to all
system users.
GROUND SPEED- The speed of an aircraft relative
to the surface of the earth.
GROUND STOP (GS)- The GS is a process that
requires aircraft that meet a specific criteria to remain
on the ground. The criteria may be airport specific,
airspace specific, or equipment specific; for example,
all departures to San Francisco, or all departures
entering Yorktown sector, or all Category I and II
aircraft going to Charlotte. GSs normally occur with
little or no warning.
GROUND VISIBILITY-
(See VISIBILITY.)
GS-
(See GROUND STOP.)
2/14/08 Pilot/Controller Glossary
PCG H-1
H
HAA-
(See HEIGHT ABOVE AIRPORT.)
HAL-
(See HEIGHT ABOVE LANDING.)
HANDOFF- An action taken to transfer the radar
identification of an aircraft from one controller to
another if the aircraft will enter the receiving
controller's airspace and radio communications with
the aircraft will be transferred.
HAR-
(See HIGH ALTITUDE REDESIGN.)
HAT-
(See HEIGHT ABOVE TOUCHDOWN.)
HAVE NUMBERS- Used by pilots to inform ATC
that they have received runway, wind, and altimeter
information only.
HAZARDOUS INFLIGHT WEATHER ADVISORY
SERVICE- Continuous recorded hazardous
inflight weather forecasts broadcasted to airborne
pilots over selected VOR outlets defined as an
HIWAS BROADCAST AREA.
HAZARDOUS WEATHER INFORMATIONSummary
of significant meteorological information
(SIGMET/WS), convective significant meteorological
information (convective SIGMET/WST), urgent
pilot weather reports (urgent PIREP/UUA), center
weather advisories (CWA), airmen's meteorological
information (AIRMET/WA) and any other weather
such as isolated thunderstorms that are rapidly
developing and increasing in intensity, or low
ceilings and visibilities that are becoming widespread
which is considered significant and are not
included in a current hazardous weather advisory.
HEAVY (AIRCRAFT)-
(See AIRCRAFT CLASSES.)
HEIGHT ABOVE AIRPORT- The height of the
Minimum Descent Altitude above the published
airport elevation. This is published in conjunction
with circling minimums.
　
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