Depth Offset (Advanced); Aux. Temp Offset (Advanced); Temp. Offset (Advanced); Speed Calibration (Advanced, With Speed Paddlewheel Only) - Humminbird 1158c Combo Installation And Operation Manual

Depth Offset will adjust the digital depth readout to indicate depth from the waterline or boats
keel. Enter a positive vertical measurement from the transducer to the waterline to read the
depth from the waterline. Enter a negative vertical measurement from the transducer to keel to
read the depth from the keel.
Aux Temp Offset will adjust the aux temperature readout (the temperature on the optional-
purchase temperature probe or Temp/Speed accessory) by the amount entered.
Temp Offset will adjust the temperature readout by the amount entered.
Speed Calibration will adjust the speed readout by the percentage entered, and will appear in
the menu if a Speed accessory is connected and the paddlewheel has moved at least once.
Local Time Zone selects your time zone in reference to the time reported by the GPS receiver
when Time+Date is selected as a Digital Readout (see Setup Menu Tab: Select Readouts).
Daylight Saving Time adjusts the time display to account for local Daylight Saving Time when
Time+Date is selected as a Digital Readout (see Setup Menu Tab: Select Readouts).
Selecting On adds one hour to the time display adjusted for your local time zone. Selecting Off
leaves the time display as adjusted for your local time zone.
Setup Menu Tab
Depth Offset
(Advanced)
Settings:-10.0 to +10.0 feet or -3 to 3 meters [International models only],
Default = 0.0, or Off
Aux. Temp Offset
(Advanced)
Settings: -10.0 to +10.0 degrees, Default = 0
Temp. Offset
(Advanced)
Settings: -10.0 to +10.0 degrees, Default = 0, or Off
Speed Calibration
(Advanced, with Speed paddlewheel only)
Settings: -20% to +20%, Default = 0%
Local Time Zone
(Advanced)
Settings: Various; Default = EST [UTC-5] - Eastern Standard Time
Daylight Saving Time
(Advanced)
Settings: Off, On; Default = Off
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