Glossary

Desired Track (DTK): The desired course of navigation between a point of origin (FROM) and a destination (TO) waypoint.

Destination: The last waypoint in the active route.

Dilution of Precision (DOP): A merit value for the calculated position based on the geometrical configuration of the satellites used; 3 is considered good, greater than 7 is considered poor. Also called Precision Dilution of Precision or PDOP.

Direct-To:The function or procedure that directs you from your present position to the designated TO waypoint.

Distance: A measure of interval in space. Also referred to as range.

DME: Distance Measuring Equipment

Drift: Displacement from the intended course of travel.

EElevation: The angle of a GPS satellite above the horizon.

Emergency Search: The function that allows you to immediately navigate to the nearest airport in the case of an emergency.

Ephemeris: A list of accurate positions or locations of a celestial object as function of time.

Estimated Time of Arrival (ETA) - The estimated time of arrival at the TO waypoint in UTC time using a 24 hour clock.

Estimated Time En route (ETE) - The estimated time from your present position to the TO waypoint.

FFAF: Final Approach Fix.

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