Garmin GPS III Plus Owner's Manual - Page 106
Navigation Terms
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APPENDIX G Navigation Terms 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 travelled since last reset. Also see 'Odometer'. Turn-The angle difference between the bearing to 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 destination along a desired course. Also referred to as the 'vector velocity' to your destination. WPT 1 NORTH WPT 2 Course Distance Bearing Course Error Track Speed VEHICLE 96