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The receiver status field, located at the top left of the page, can display the fol-
lowing messages under various conditions:
Search sky - The GPS 155 is searching the sky for visible satellites. You will be
informed with the message ‘Searching the sky’.
Acquiring - The GPS 155 is acquiring satellites for navigation.
2D Nav - The GPS 155 is in 2D navigation mode. If your installation does
not include an altitude serializer, you must enter the altitude
manually (see page 2.)
3D Nav - The GPS 155 is in 3D navigation mode and will compute
altitude.
Simulator - The GPS 155 is in simulator mode, which should only be used
for practice and trip planning. NEVER use simulator for actual
navigation.
Poor cvrg - The GPS 155 cannot acquire sufficient satellites for navigation.
Need alt - The GPS 155 needs altitude in order to start/continue navigation.
Go to the position page and enter the altitude.
Need pres - The GPS 155 needs the current altimeter (barometric pressure) set-
ting at the approach airport. Enter the altimeter setting on the
Position page.
Not usable - The GPS 155 is unusable due to incorrect initialization or abnor-
mal satellite conditions. Turn the unit off and back on again. If this
does not help, return the unit to an authorized GARMIN dealer for
service.
85
UNIT SETTINGS
Status Page
Acquiring satellite data.
Searching the Sky.
155man (GOOD) 7/24/98 1:57 PM Page 85