Sound Volume; Units - Depth; Units - Temp (International Only); Units - Distance (With Speed Input Only) - Humminbird 1158c Combo Installation And Operation Manual

Sound Volume allows you to control the volume of all sounds emitted by the control head
(except for the volume of the alarms, which is controlled by Alarm Volume Control).
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

Sound Volume

Settings: Mute, 1 - 10, Default = 5

Units - Depth

Settings: Domestic Models: Feet, Fathoms; International Models: Meters;
Default = Feet/Meters
Units - Temp
(International only)
Settings: Celsius, Fahrenheit; Default = Celsius
Units - Distance
(with Speed input only)
Settings: Domestic Models: Statute Miles, Nautical Miles, Default =
Statute Miles;
Meters/Nautical Miles, Feet/Statute Miles, Feet/Nautical Miles, Default
= Meters/Kilometers
Units - Speed
(with Speed input only)
Settings: Domestic Models: mph, kts; International Models: kph; Default
= mph/kph
188
International Models: Meters/Kilometers,