Raymarine Lighthouse Sport 3.10 Series, Advanced Operation Instructions, Page: 144 / 178

1. Select Adjust zone from the guard zone alarm menu.
2. Use the Directional pad to adjust the size and position of the outer perimeter to the desired
location.
3. Press the OK button to switch to the inner perimeter.
4. Use the Directional pad to adjust the size and position of the inner perimeter to the desired
location.
5. Press the Back button to set the guard zone.
10.8 Sensitivity controls
Optimum performance is usually achieved using the default settings. You may be able to enhance
the radar image using the sensitivity controls.
Sensitivity settings can be accessed by pressing the OK button while in motion mode, or the Adjust
sensitivity menu: Menu > Adjust sensitivity .
.
Control Description
‘G’ Gain
The control determines the signal strength at which target returns are shown
onscreen.
A higher value produces more target returns and noise onscreen.
‘R’ Rain
Precipitation appears on the radar screen as lots of small echoes which
continuously change size, intensity and position. The rain control suppresses
these echoes making it easier to identify real objects.
The higher the rain control is set the more echoes will be suppressed.
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