II Morrow Inc. 920 GPS User Manual
Page 89
Course: The planned direction of travel in a horizontal
plane.
Course Deviation: A measurement of distance left or
right from the desired course of travel.
CDI (Course Deviation Indicator): A graphic indicator
of course deviation typically shown as a graduated
horizontal bar with an icon indicating the deviation
distance left or right of course.
CTAF: Common Traffic Advisory Frequency
Database: A collection of data structured in such a way
as to allow quick and convenient access to any particular
record or records. The Apollo handheld GPS receiver
contains a built in database of waypoints and waypoint
information to which the user may add waypoints.
Degree: 1/360th of a circle.
Distance: A measure of interval in space or time. Also
referred to as range.
DME: Distance Measuring Equipment
Drift: Displacement from the intended course of travel.
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