Units - Depth; Units - Temp (International Only); Units - Distance; Units - Speed - Humminbird 500 Series Operation Manual

Units - Depth selects the units of measure for all depth-related readouts.
Units - Temp selects the units of measure for all temperature-related readouts.
International Models only.
Units - Distance selects the units of measure for all distance-related readouts,
and will appear in the menu if a Temp/Speed Accessory is connected and the
paddlewheel has moved at least once, or if the GPS Receiver is connected.
Units - Speed selects the units of measure for speed-related readouts, and will
appear in the menu if a Temp/Speed Accessory is connected and the
paddlewheel has moved at least once, or if the GPS Receiver is connected.
Setup Menu Tab

Units - Depth

Settings: Domestic Models: Feet, Fathoms; International
Models: Meters; Default = Feet/Meters
Units - Temp
(International only)
Settings: Celsius, Fahrenheit; Default = Celsius

Units - Distance

Settings: Domestic Models: Statute Miles, Nautical Miles,
Default = Statute
Meters/Kilometers, Meters/Nautical Miles, Feet/Statute
Miles, Feet/Nautical Miles, Default = Meters/Kilometers

Units - Speed

Settings: Domestic Models: mph, kts; International Models:
kph; Default = mph/kph
78
Miles; International Models: