Garmin GPS 12MAP - Manual (Page 37)

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AutoLocate— forces the GPS 12 MAP to
search for any available satellite(s) to deter-
mine its position. This option is useful if
you’ve relocated a long distance (>500 miles)
from the last location the GPS 12 MAP was
used.
To select AutoLocate, highlight
‘AutoLocate’ and press ENTER.
Initialize Position— allows you to designate
your approximate position in order to speed
up satellite acquisition. This option may be
used in lieu of ‘AutoLocate’, above.
To initialize your starting position:
1. Highlight ‘Initialize Position’ and press ENTER.
2. Designate your approximate position on the map
using the rocker keypad and press ENTER. (You
may wish to use the IN/OUT zoom keys to adjust
the level of detail displayed, as you determine
your approximate position.)
Set 2D Altitude— allows you to designate
your approximate altitude, when the GPS 12
MAP is acquiring satellites or navigating in
2D mode. By default, 2D navigation will
attempt to use the last known altitude. If the
altitude shown is off by several hundred feet
(or more), manually entering your approxi-
mate altitude will enable the receiver to more
accurately determine a position fix.
NOTE: You can only enter altitude while in 2D
or in ‘Simulator’ mode. Altitude is automatically
calculated in 3D Mode.
To enter an altitude:
1. Highlight ‘Set 2D Altitude’ and press ENTER.
2. Enter your approximate altitude using the rocker
keypad, and press ENTER.
REFERENCE
Satellite Status
Page Options
‘Initialize Position’ is used
to designate your approxi-
mate position directly on
the map display. The re-
ceiver uses this informa-
tion to determine which
satellites should be in view.
With 2D coverage, you
will need to enter your
approximate altitude.
Without an approximate
altitude, your position
error can be substantial.