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To change the Grayline level, press
MENU until the GRAYLINE menu ap-
pears.
Press
UP ARROW to increase the level or press DOWN ARROW to de-
crease it. The percentage of Grayline in use shows in this menu. Echoes
scrolling onto the screen will also show the effects of the Grayline
change. If you reach the maximum or minimum level, a tone sounds
alerting you to the limits. Press
PWR to clear the menu.
At left, Grayline menu screen. Center, little Grayline indicates a soft
bottom, probably sand or mud. At right, the wider Grayline indicates a
harder, rocky bottom.
Fish I.D.
The Fish I.D. feature identifies targets that meet certain conditions
as fish. The microcomputer analyses all echoes and eliminates surface
clutter, thermoclines and other signals that are undesirable. In most
instances, remaining targets are fish.
The Fish I.D. feature displays symbols on the screen in place of the ac-
tual fish echoes. There are three symbol sizes: small, medium, and
large. These show the relative size between targets. In other words, it
Wider
Gra
y
line
Thin or no Grayline