Lowrance xog 用户手册

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页码 60
35 
Current Position Lock 
Two buttons on the left side of the Satellites screen indicate the quality 
of the units position lock. If 2D or 3D is not highlighted the unit may 
not have a satellite lock. 
2D
 lock does not include altitude. The unit must receive reliable signals 
from 3 satellites to establish a 2D lock. 
3D
 means the unit has achieved a more reliable lock, including altitude. 
The unit must receive signals from 4 satellites to establish a 3D lock. 
EPE (Estimated Position Error) 
The Estimated Position Error, or EPE, represents the expected error 
from a benchmark location. If the EPE shows 50 feet, then the position 
shown by the unit is estimated to be within 50 feet of your actual loca-
tion. 
Satellite Display 
A white circle serves as a graphical view of the satellites overhead. 
Each satellite is shown on the circular chart relative to your position. 
The GPS receiver is tracking satellites that are in light blue type. The 
receiver has not locked onto a satellite if the number is in dark blue. 
Lat/Lon Coordinates 
Beneath the Satellite Display are the coordinates in latitude and longi-
tude.