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Grayline
®
Grayline
lets you distinguish between strong and weak echoes. It al-
lows you to tell the difference between a hard and soft bottom. For ex-
ample, a soft, muddy or weedy bottom returns a weaker signal which is
shown with a narrow line or no gray line at all. A hard bottom returns
a strong signal, which will be displayed as a wide gray line.
Grayline scroll bar.
If you have two signals of equal size, one with gray and the other with-
out, then the target with gray is the stronger signal. This helps distin-
guish weeds from trees and fish from structure.
A small amount of Grayline indicates a soft bottom (left), probably
sand or mud. More Grayline indicates a harder, rocky bottom (right).
Grayline is adjustable. Since Grayline shows the difference between
strong and weak signals, adjusting the sensitivity may also require a
different Grayline level. The level chosen by the sonar unit at power on
is usually adequate for most conditions. Experiment with your unit to
find the Grayline setting that's best for you.
Wider
Gra
y
line
Thin or no Grayline