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Fig. 29
Note: As the II+ calculates the
FOM, it will rapidly change
and then begin to stabilize
over time.
29
Marking a Position
The GPS II
+
allows you to mark, store, and use up to 500 positions as way-
points. Waypoints serve as electronic markers that let you keep track of starting
points, destinations, navaids, etc. A waypoint position can be entered by taking an
instant electronic fix, by manually entering coordinates (see p. 34), or by referencing
a bearing and distance to a known position (see p. 35).
To mark your present position:
1. Press MARK. The mark Position Page will appear, showing the captured position and a
default three-digit waypoint name (Fig. 29).
2. To save a default name and symbol, press ENTER to confirm the ‘SAVE?’ prompt.
Position Averaging Function
Position Averaging provides more accurate saved positions by reducing position
error when marking waypoints.
1. After pressing MARK, highlight the ‘AVERAGE?’ field, and press ENTER. The Figure of
Merit (FOM) field will display a value reflecting estimated accuracy of the averaged
position.
gps ii + Mon (final?) 2/9/98 4:24 PM Page 29