Furuno GS-100 Operator's Manual page 26

2. DISPLAYS
GNSS
The GNSS display shows the condition of satellite positioning system. Number, azi-
muth and elevation angle of all satellites (if applicable) in view of your receiver appear.
Satellites used for positioning (Satellite numbers used for positioning
are displayed in white, or black if not used for positioning.)
Elevation 60° Elevation 30°
*: Satellites are displayed in order of acquisition, not numerical order.
2-6
Elevation 0°
Receiver signal level
Bars show signal level.
Satellite numbers*
Green: Satellites acquired by ANT1
Purple: Satellites acquired by ANT2
Blue: Satellites common to ANT1 and ANT2
Gray: Blocked satellites