Reset; Language (International Models Only); Units - Temp (International Models Only, Units Submenu); Units - Depth (International Models Only, Units Submenu) - Humminbird PiranhaMAX 197c Installation And Operation Manual

Use this menu choice with caution!
Reset restores ALL menu settings to their factory defaults.
Language selects the display language for menus.
Units - Temperature selects the units of measure for all temperature-related
readouts.
Units - Depth selects the units of measure for all depth-related readouts.

Reset

Settings: Select CONFIRM and press the CHECK/ENTER key to
activate.
Language
Settings Vary; Default = English, Setting Saved in Memory
Units - Temperature
(International Models only, Units submenu)
Settings: ˚C (Celsius), ˚F (Fahrenheit); Default = ˚C (Celsius),
Setting Saved in Memory
Units - Depth
(International Models only, Units submenu)
Settings: Feet, Meters, Fathoms; Default = Meters, Setting
Saved in Memory
(International Models only)
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Setting up the Control Head