Raymarine LIGHTHOUSE 3, Advanced Operation Instructions

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1. Unpause — Selecting this option resumes live sonar scrolling.
2. Scroll back bar — Use this to move back and forward through the available sonar history. You
can either drag the position indicator right or left or select a specific location on the bar to
jump to that position.
In Sonar, DownVision and SideVision channels, subsequent swipes will rewind the sonar history and
swiping in the opposite direction will fast forward the sonar history.
11.6 Sonar 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 setting adjustment is also applied
to the sonar history that is displayed when using sonar scroll back.
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 Sonar module in use.
Control Name Description
‘G’ Gain
The control determines the signal strength at which
target returns are shown onscreen.
The Gain control can be set to
Auto or Manual .
Depending on Sonar module, in Auto you can add
an offset of up to ± 50%.
A higher value produces more target returns and
noise onscreen.
‘I’ Intensity , or
‘CG’ Color Gain
The control sets the lower limit for the color used for
the strongest target returns. All target returns above
this value are displayed in the strongest color. Those
with a weaker value are divided equally between the
remaining colors.
The control can be set to
Auto or Manual . Depending
on Sonar module, in Auto you can add an offset of
up to ± 50%.
‘SF’ Surface Filter , or
‘NF’ Noise filter
The control determines the amount of noise
displayed onscreen by varying the gain throughout
the water column.
A lower value decreases the depth at which the
control is applied.
The control can be set to
Auto or Manual .
Fishfinder app
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