Radar Sensitivity Controls - Raymarine LIGHTHOUSE 3 Advanced Operation Instructions

12.13 Radar sensitivity controls

Optimum performance is usually achieved using the default settings. You can adjust the image using
the Sensitivity controls to improve the displayed image.
Sensitivity settings can be accessed using the onscreen Image adjustment
icon, or the Adjust sensitivity menu option: Menu > Adjust sensitivity.
The Sensitivity controls available are dependant upon the Radar scanner in use.
Control Name
'G' Gain
'R' Rain
284
Description
The control determines the signal strength at which
target returns are shown onscreen.
The Gain control can be set to Auto or Manual.
A higher value produces more target returns and
noise onscreen.
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 object.
The higher the Rain control is set the more echoes
will be suppressed.