Yachting Electronic Co. FC80, Руководство пользователя

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suggest you turn off the Fish ID, and only study the sonar
returns which is displayed as archs.
To set the Fish ID.:
1) Press MENU to enter into menu
setting,
2) Use the Up / Down Arrow to
select Fish ID.. option.
3) Press ENT to confirm selecting
4) Use the Up / Down Arrow to
change the value.
5) Press ENT to confirm the setting.
6) Press EXIT to exit.
Units Units
Units is used to choose depth unit and Temp unit. There
are four combinations for you to choose the depth unit and
Temp unit:
Fahrenheit / Feet
Fahrenheit / Meter
Celsius / Feet
Celsius / Meter