Garmin GNS 430 - Manual (Page 15)

7
If the unit can only obtain enough satellites for 2D navigation (no altitude), the unit
will use the altitude provided by your altitude encoder (if one is connected).
If the GNS 430 has not been operated for a period of six months or more, it may have
to ‘Search the Sky’ to collect new data. This means the unit is acquiring satellite data to
establish almanac and satellite orbit information, which can take 5 to 10 minutes. The sat-
ellite status page will display a ‘Search Sky’ status, and the message annunciator (MSG),
above the
M key, will also fl ash to alert you of a system message, ‘Searching the Sky’.
To view a system message, press M .
The message page will appear and display the status or warning information applicable
to the receiver’s current operating condition.
To return to the previous page after viewing a message, press M again.
The satellite status page shows the ID
numbers for the satellites and the relative
signal strength of each satellite received (as a
“bar graph” reading.
‘Searching Sky’ indicates that satellite almanac
data is not available or has expired (if the
unit hasn’t been used for six months or more).
The data will be recollected from the first
available satellite.
The ‘INTEG’ annunciator (bottom left corner
of the screen) indicates that satellite coverage
is insufficient to pass built-in integrity
monitoring tests. In the example above,
not enough satellites are being received to
determine a position.
Message Page
TAKEOFF TOUR
Acquiring Satellites &
Viewing Messages
NOTE
The GNS 430 utilizes certain software algorithms to ensure reliable GPS
receiver operation. Receiver Autonomous Integrity Monitering or RAIM
is an example as is Fault Detection and Exclusion, or FDE. These fea-
tures allow navigation during Oceanic/Remote legs of a flight using the
GNS 430. For further details, please refer to pages 146, 163, and 181.
190-00140-00.indd 7 5/7/2003, 5:16:11 PM