Garmin GPS II Plus - Manual (Page 34)

Fig. 28a
Fig. 28b
28
Reference
Maximum Speed Field
To obtain the most accurate reading of average speed, keep in mind that due to
the sensitivity of the GPS II + ’s antenna, your maximum speed value may include the
effects of rapid movement, such as swinging your arm while holding the unit.
To reset the maximum speed field:
1. Highlight the ‘maximum speed’ field, and press ENTER.
2. Press ENTER to confirm the ‘RESET?’ prompt (Fig. 28a).
Altitude Field
When the GPS II + is acquiring satellites or navigating in the 2D mode, the last
known altitude will be used to compute your position. If the altitude shown is off by
several hundred feet, you can manually enter your altitude for greater accuracy. In
cases where the GPS II
+ has only 2D coverage, entering your approximate altitude
will enable the receiver to determine a 3D fix.
To enter an altitude:
1. Highlight the ‘alt’ field, and press ENTER (Fig. 28b).
2. Enter a value, and press ENTER.
gps ii + 8/4/98 3:28 PM Page 28