Garmin Apollo GX50, User Manual

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Ground Speed (GS): Speed of travel across the
ground. In aviation, the relation between ground
speed and air speed is affected by the prevailing
winds.
H HDOP: Horizontal Dilution of Precision.
See
Dilution Of Precision.
Hold: Waypoint sequencing is disabled or
suspended. A hold may be automatically or manually
activated. This should not be confused with a
“holding pattern.” Pressing the
OBS/HLD key
suspends waypoint sequencing.
I IAF: Initial Approach Fix.
Identifier: A name, typically abbreviated, assigned to
a waypoint. The identifier may consist of numbers
and alpha characters, up to six in length. For example,
the airport identifier for Los Angeles International
Airport is LAX.
IFAF: Initial and Final Approach fix. A combined
Initial and Final approach Fix with no intermediate
waypoints.
IFR: Instrument Flight Rules
Intersection (INT): A point defined by any
combination of courses, radials, or bearings of two or
more navigational aids.
K Knot (kt): A unit of speed equal to one nautical mile
per hour.
L Latitude (Lat): Any line circling the earth parallel to
the equator, measured in degrees, minutes, and
seconds north and south of the equator.
LFAC: L anding FAC ility.
Longitude (Lon): Any line from the north to the
south pole, measured in degrees, minutes, and
15-6
Glossary