Appendix E: Navigation Terms - Garmin GPS 76 Owner's Manual

Getting Started Appendix E
Navigation Terms
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A running tally of distance travelled, based upon the distance between
Odometer—
second-by-second position readings.
The distance you are off a desired course in either direction, left or
Off Course—
right. Also 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'.
Time To— The estimated time required to reach a GOTO destination, or the next
waypoint in a route. Also referred to as 'estimated time en route'.
The estimated time required to reach a GOTO destination, or the
Time to Dest—
fi nal waypoint in a route.
The estimated time required to reach a GOTO destination, or the
Time to Next—
next waypoint in a route.
To Course— The recommended direction to steer in order to reduce course error
or stay on 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
Track—
as 'ground track'.
Trip Odometer— A running tally of distance travelled since last reset. Also see
'Odometer'.
Total Average Speed— Average speed of unit for both moving and stopped speeds
since last 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
Turn—
current track. '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.