Garmin gpsmap 198c sounder User Manual

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The location of each available satellite shows over two location 

rings on the Satellite Information Page. The outer ring represents 

the horizon, the inner ring represents 45° above the horizon, and 

the center represents directly overhead. When the unit is using a 

satellite for navigation, the satellite number is highlighted on the 

location rings. The unit can be set to show satellite location with 

North or your current track at the top of the screen. 

The Satellite Strength Indicator Bars show the strength of the 

signal being received, and the status of the signal. The bars are 

either shaded or filled. The gray bar means the GPS is in the 

process of storing orbital data it is receiving from the satellite 

signal. When the bar turns solid, the GPS is using the satellite 

signal for navigation. A “D” in or above the bar means that 

differential corrections (WAAS or DGPS) are being applied to that 

satellite.

The GPS gets date and time information from the satellite’s on-

board atomic clock. When the GPS receiver has achieved a 2D 

or 3D GPS location, the current location appears in the selected 

location format.