the Aviation Dictionary

glideslope intercept altitude - The minimum altitude to
intercept the glideslopelpath 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.
gliding angle - The angle between the flight path during
a glide and a horizontal axis relative to the ground.
gliding ratio - The ratio of the horizontal distance an
aircraft travels while gliding for every unit of vertical
distance it descends.
g-load - Gust load, the incremental change in vertical
acceleration of an aircraft.
global circulation system - In meteorology, the
combination of the general and monsoon circulations.
global navigation satellite systems (GNSS) - An
"umbrella" term adopted by the International Civil
Aviation Organization (ICAO) to% encompass any
independent satellite navigation system used by a pilot
to perform onboard position determinations from the
satellite data.
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 fiom
the satellites in view and translates these into three
dimensional position, velocity, and time. System
accuracy for civil users is normally 100 meters
horizontally.
globules - A tiny ball of liquid often found in
suspension with some other liquid.
glow coil igniter - An ignition igniter. Around a pin
extending from the body of the igniter is a resistance
wire wound into a coil. Direct current causes the coil to
become red hot, igniting the heVair mixture until the
device is operating at a temperature sufficient to
maintain the flame. At this point current to the glow
coil is automatically turned off.
glow discharge tube - A glass tube with a gas such as
neon under low pressure. Two electrodes are embedded
in opposite ends of the tube. When a sufficiently high
potential difference is applied between the electrodes,
the gas will ionize and glow.
glideslope intercept altitude . Gold Seal Flight Instructor Certificate
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glow plug igniter - An igniter that uses a coil of wire
heated by high-voltage DC electricity. Air and he1
blowing through the coil is ignited to initiate
combustion in the combustor section.
glue - A liquid adhesive capable of holding materials
together after drying.
glue blocks - Wood blocks used as backing support
when making repairs to a wooden structure. They
distribute clamp pressure evenly over the area being
glued.
glue joint - Glued wood joints. Two pieces of wood
joined using glue rather than a mechanical fastener.
Glyptal - A registered trade name of an insulating
varnish used in electrical machinery.
go ahead - Proceed with your message. Not to be used
for any other purpose.
go around - 1. To abort a landing. 2. Instructions for a
pilot to abandon his 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 pattem altitude and enter the traffic pattem 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).
golno-go gauge - A measuring gauge consisting of a
part having two dimensions: the minimum size and the
maximum size. An opening of the correct dimension
will allow one side to go, or pass through, and the other
dimension will not.
goals and values - A perception factor that describes
how a person's perception of an event depends on
beliefs. Motivation toward learning is affected by how
much value a person puts on education. Instructors who
have some idea of the goals and values of their students
will be more successful at teaching them.
go-around power or thrust setting - The maximum
allowable in-flight power or thrust setting identified in
the performance data.
gold - A malleable, ductile, yellow corrosion-resistant
chemical element with a symbol of Au and an atomic
number of 79. Used on critical electrical contacts
because of its resistance to corrosion.
gold leaf - Pure gold rolled into extremely thin sheets.
Gold Seal Flight Instructor Certificate - A flight
inst~ctor certificate printed with a distinctive gold seal
to recognize excellence in flight training based on a
CFI's record of performance. To obtain a gold seal
certificate, a CFI must have trained and recommended
at least 10 students for practical tests within the