Zoom Key
The POWER/CLEAR key is used to turn the Fishfinder on or
off. During the operation, you can use it to clear the screen.
Exit Key
The exit key is used to exit a menu setting and go back o
the superior menu Exit key. When the sonar is woriking, if
the Exit key is pressed down, a "HOLD" will be displayed on
the lower left part of the screen. The scrolling will stop until
the Exit key is pressed down again.
Up/Down arrow Keys
The Up / Down arrow keys are used to move up or down to
select the menu.
Left/Right arrow Keys
The Up/Right keys are used to move left or right to select
the menu. The Up/Down keys are also used to enter into a
menu option and increase or decrease a value.
Data interface
Data Interface
The sonar unit provides a Data Interface, which is for the
software updating and GPS connector.
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Echofish 820 – Installation & Operation manual