Specifications
53 
Sonar Alarms menu with Fish Alarm selected. The check box to the left 
is blank, indicating the alarm is turned off. 
To turn the fish alarm on 
1. Press the ALARM key on the front of the unit or press MENU|MENU and 
use ↑ or ↓ to select Sonar Alarms, then press 
ENT. 
2. Press ↓ to 
FISH ALARM|ENT|EXIT. 
3. To turn off the alarm, Press the 
ALARM key on the front of the unit or 
press
  MENU|MENU and use ↑ or ↓  to select Sonar Alarms, then  press 
ENT. Press ↓ to FISH ALARM|ENT|EXIT. 
Brightness 
See the entry in this section for Screen Contrast and Brightness. 
Calibrate Speed 
The speed sensor can be calibrated to compensate for inaccuracies. Be-
fore you change the setting, first calculate the percentage that the 
speed is off. You will enter this percentage in a moment. 
For example, if you figure the sensor is reading 10 percent faster than 
actual speed, you will enter – 10 in the calibration window. If the sen-
sor is reading 5 percent slower than true speed, you will enter + 5 in 
the window. 
Perform your test in relatively calm water free of current, if possible. 
(Unless, of course, you are taking the current speed into consideration 
when making your calculation.) After you have a correction figure, 
here's how to enter it: 
1. Press 
MENU|MENU|↓ to CALIBRATE WATER SPEED|ENT. 
2. Enter the number you calculated earlier: press ↑ or ↓ to change the 
first character (+ or –), then press → to move the cursor to the next 
number and repeat until the percentage is correct, then press 
EXIT. 










