Lowrance LCX-20C, Operation Instructions Manual

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indicate that satellite lock has been lost and there is no position
confirmed. The Satellite Status Page shows you the quality and
accuracy of the current satellite lock-on and position calculation.
WARNING:
Do not begin navigating with this unit until the numbers
have stopped flashing!
The Satellite Status Page.
This screen shows a graphical illustration of the satellites that are in view.
Each satellite is shown on the circular chart relative to your position. The
point in the center of the chart is directly overhead. The small inner ring
represents 45° above the horizon and the large ring represents the horizon.
North is at the top of the screen. You can use this to see which satellites are
obstructed by obstacles in your immediate area if the unit is facing north.
The GPS receiver is tracking satellites that are in light blue. The
receiver hasn't locked onto a satellite if the number is dark blue,
therefore it isn't being used to solve the position.
Beneath the circular graph are the bar graphs, one for each satellite in
view. Since the unit has twelve channels, it can dedicate one channel
per visible satellite. The taller the bar on the graph, the better the unit
is receiving the signals from the satellite.
The "Estimated Position Error" (horizontal position error) shown in the
upper left corner of the screen is the expected error from a benchmark
location. In other words, if the EPE shows 50 feet, then the position
shown by the unit is estimated to be within 50 feet of the actual
location. This also gives you an indicator of the fix quality the unit
currently has. The smaller the position error number, the better (and
more accurate) the fix is. If the position error flashes dashes, then the
unit hasn't locked onto the satellites, and the number shown isn't valid.