Lowrance electronic ifinder expedition c User Manual

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This screen shows a graphical view 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 in-

ner ring represents 45° above the horizon and the large ring represents 

the horizon. North is at the top of the screen. If you hold the unit facing 

north, you can use it to see which satellites are obstructed by obstacles 

in your immediate area. The GPS receiver is tracking satellites that 

are in bold type. The receiver hasn't locked onto a satellite if the num-

ber is grayed out, which means it isn't being used to resolve the posi-

tion. 
Beneath the circular graph are the bar graphs, one for each satellite in 

view. Since the unit has 16 channels, it can dedicate one channel per 

visible satellite. The taller the bar on the graph, the better the unit is 

receiving signals from the satellite. 
The Estimated Position Error (EPE), shown above the bar graphs, 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 more accurate the fix. If the position error flashes dashes, 

then the unit hasn't locked onto the satellites and the number shown 

isn't valid.  
Navigation Page 
At the center of the Navigation Page is a compass rose. It shows direc-

tion of travel and the direction to a recalled waypoint. When you're not 

navigating to a waypoint or destination, the navigation screen looks 

like the one in the following image. No graphic course information is 

displayed. Your position is shown by an arrow in the center of the