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database of waypoints and waypoint information. Users
may add waypoints to this database.
Degree: 1/360th of a circle.
Desired Track (DTK): The desired course of navigation
between a point of origin and a destination waypoint.
Distance: A measure of interval in space. Also referred to
as range.
Distance Measuring Equipment (DME)
Drift: Displacement from the intended course of travel.
E
Elevation: The altitude above ground.
Estimated Time of Arrival (ETA)
Estimated Time Enroute (ETE)
F
Fix: A geographical location determined by either visual
reference or by electronic navigation aids.
G
Ground (GRND): Ground communication frequency
GroundSpeed (GS): Speed of travel acrosstheground.In
aviation, the relation between ground speed and air speed
is affected by the prevailing winds.
I
Icon: A symbol shown on the display depicting present
position. The icon is shown as a symbol of an airplane on
the Apollo 360’s moving map screens.
Identifier: A name, typically abbreviated, assigned to a
waypoint. The identifier mayconsist of numbers and alpha
characters, up to six in length. For example, the airport
identifier for Los Angeles International Airport is LAX.
A-2 P/N 560-0119-00
Glossary of Navigation Terms Apollo 360 Map Display