What Is Rcg; About Search Sectors - Simrad SX90 - REFERENCE MANUAL REV D Reference Manual

Simrad SX90
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What is RCG?

RCG means "Reverberation Controlled Gain". This function
compare the strength from each echo, and then automatically
adjust the range and echo level in the sonar picture.
The RCG will remove unwanted echoes from the sea surface and
the bottom. If you select setting
disappear altogether if the bottom is flat, while schools of fish
close to the bottom will be easier to see.
Note that scattered fish may be more difficult to spot if the RCG
function is active, as these can be misinterpreted as reverberation.
It is therefore important that you use the RCG with great care if
your are searching for scattered fish.
Default setting on the SX90 sonar is

About search sectors

The SX90 sonar can transmit the sound in two shapes;
or .
Sector
Figure 35 Omni transmission
An transmission means that the sound is transmitted in a
Omni
full 360 degrees circle around the vessel, while
it is transmitted in a defined direction shaped like a cone. The
transmission will provide you with a longer range.
Sector
the bottom echoes will
Strong
.
Medium
Sector
Omni
means that
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