with dark pixels and strong returns with lighter pixels. This can
be useful to see weak signals.
If Grayline is "off", strong returns will be represented with
dark pixels and weak returns with lighter pixels. This can be
useful to see strong signals.
To set the Grayline:
1- Press Menu to enter into menu setting.
2- Repeatedly Press Menuto switch to SONAR menu.
3- Use the Up / Down Arrow to select Grayline option.
4- Press Ent to enter into setting.
5- Use the Up / Down Arrow to select the option.
6- Press Ent to confirm the setting.
7- Press Exit to exit the setting.
4. Fish ID Sens.
Fish ID Sens. is used to adjust the threshold of fish size detec-
tion.
If you select a high value setting, weak returns can be detect-
ed and displayed on the screen as small fishes. This is useful if
you intend to identify small fish species.
If you select a low value setting, only strong returns can be
detected and displayed on the screen as big fishes. This is
usefule if you intend to identify large fish species.
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Echofish 600 – Installation & Operation manual