Garmin GPS III Plus - Manual (Page 37)

Poor GPS Coverage— the receiver isn’t tracking enough satellites for a 2D or
3D fix due to bad satellite geometry.
Not Usable— the receiver is unusable, possibly due to incorrect initialization
or abnormal satellite conditions. Turn the unit off and back on to reset, and
reinitialize the receiver if necessary.
Simulating Nav— the receiver is in simulator mode.
‘Need to Select Initialization’ Prompt
If no satellites are received for several minutes (or an insufficient number of
satellites are received to determine a position fix) a message will appear, prompting
you to initialize the receiver (see page 5). This allows you to specify a starting
location from which to search for satellites, or to enable the AutoLocate feature, and
is useful if you have traveled over 500 miles with the receiver off. (This message will
automatically appear when you first use your GPS III+. The prompt may also appear
during normal use if the antenna is shaded or the unit is used indoors.)
Battery Level Indicator
The Satellite Status Page also features a battery level indicator, located to the left of
the sky view, which displays the strength of the unit’s batteries. The battery indicator
will not appear if the receiver is operating on external power.
NOTE: The battery level indicator is calibrated for alkaline batteries. NiCad and
lithium batteries will display the battery level differently due to voltage differences. To
display battery level accurately select the appropriate type, as described on page 77.
The GPS III+ features an internal 10-year lithium battery that will maintain the unit’s
memory when the receiver is not running off batteries or external power.
‘Poor GPS Coverage’ means
the receiver isn’t tracking
enough satellites for a position
fix. Check for obstructions,
such as trees, buildings, etc.
This message appears if a
position fix cannot be deter-
mined after several minutes.
After acknowledging the
message, select ‘Use Map’
or ‘AutoLocate’ from the
options list.
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REFERENCE
Satellite Status Page
H