Garmin NavTalk - Manual (Page 125)

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APPENDIX F
Navigation
Terminology
Odometer - A running tally of distance traveled, based upon the dis-
tance between second-by-second position readings. Both the ‘Odome-
ter’ and the ‘Trip Odometer’ are resettable, however the “odometer’ is
typically used to keep track of total distance covered, where the ‘Trip
Odometer’ is used to keep track of Point-to-point distances.
Off Course - The distance you are off a desired course in either direc-
tion, left or right. Also referred to as ‘cross-track error’ or ‘course error’.
Ref - Reference Waypoint. Used to create a new waypoint, by specifying
a bearing and distance from an existing (reference) waypoint.
Speed - The current velocity at which you are traveling, 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
enroute’.
Time to Dest - The estimated time required to reach a GOTO destina-
tion, or the final waypoint in a route.
Time to Next - The estimated time required to reach a GOTO destina-
tion, or the 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 efficient heading to
get back to the desired course and proceed along your route.
Track - The direction of movement relative to a ground position. Also
referred to as ‘ground track’.
Trip Odometer - A running tally of distance since last reset. Also see
‘Odometer’.
Turn - The angle difference between the bearing of your destination
and your 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 destina-
tion along a desired course. Also referred to as ‘vector velocity’ to your
destination.
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