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You can change the sensitivity level whether you are in Auto Sensitiv-
ity mode or Manual Sensitivity mode. The adjustment method works
the same in both modes, but it gives you slightly different results.
Adjusting sensitivity in Auto Sensitivity Mode is similar to manually ad-
justing a car's speed with the accelerator pedal while cruise control is on.
You can tell the car to run faster, but when you let off the gas the cruise
control automatically keeps you from running slower than the minimum
speed setting. In the sonar unit, auto mode will let you increase sensitiv-
ity to 100 percent, but the unit will limit your minimum setting. This pre-
vents you from turning sensitivity down too low to allow automatic bot-
tom tracking. When you change the setting with auto turned on, the unit
will continue to track the bottom and make minor adjustments to the sen-
sitivity level, with a bias toward the setting you selected.
Adjusting sensitivity in Manual Sensitivity Mode is similar to driving a
car without cruise control — you have complete manual control of the
car's speed. In the sonar unit, manual mode allows you to set sensitiv-
ity at 100 percent (maximum) or zero percent (minimum.) Depending
on water conditions, the bottom signal may completely disappear from
the screen when you reduce sensitivity to about 50 percent or less!
Try adjusting sensitivity in both auto and manual modes to see how
they work.
To adjust sensitivity
1. Press
MENU|ENT.
2. The Sensitivity Control Bar appears. Press ↓ to decrease sensitivity;
press ↑ to increase sensitivity. When it's set at the desired level, press
EXIT. (When you reach the maximum or minimum limit, a tone sounds.)
Left, Sonar Menu with Sensitivity command selected. Right, the Sensi-
tivity Control Bar.