Appendix E: Navigation Terms - Garmin GPS 72 Owner's Manual

Introduction Appendix E
Navigation Terms
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Odometer— A running tally of distance travelled, based upon the distance between second-
by-second position readings.
The distance you are off a desired course in either direction, left or right. Also
Off Course—
referred to as 'cross-track error' or 'course error'.
Speed— The current velocity at which you are travelling, relative to a ground position. Also
referred to as 'ground speed'.
The estimated time required to reach a GOTO destination, or the next waypoint in
Time To—
a route. Also referred to as 'estimated time en route'.
Time to Dest— The estimated time required to reach a GOTO destination, or the fi nal
waypoint in a route.
Time to Next— The estimated time required to reach a GOTO destination, or the next
waypoint in a route.
The recommended direction to steer in order to reduce course error or stay on
To Course—
course. Provides the most effi cient heading to get back to the desired course and proceed
along your route.
The direction of movement relative to a ground position. Also referred to as 'ground
Track—
track'.
Trip Odometer— A running tally of distance travelled since last reset. Also see 'Odometer'.
Average speed of unit for both moving and stopped speeds since last
Total Average Speed—
timer reset.
Total Trip Timer— Total time the unit has been in operation since last reset of the trip timers.
The angle difference between the bearing to your destination and your current track.
Turn—
'L' indicates you should turn left, 'R' indicates you should turn right. The degrees indicate
the angle you are off course.
VMG— Velocity Made Good. The speed you are closing in on a destination along a desired
course. Also referred to as the 'vector velocity' to your destination.