Humminbird 561 - Manual (Page 69)

62 Setup Menu Tab
Depth Offset
(Advanced)
Settings: -10.0 to +10.0 ft or -3.0 to 3.0 m (International
models only); Default = 0.0 ft
Depth Offset will adjust the digital depth readout to indicate depth from the
waterline or boat's 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.
Temp. Offset
(Advanced)
Settings: -10.0 to +10.0 degrees; Default = 0
Temp. Offset will adjust the temperature readout by the amount entered.
Default Sonar View Sonar View with Select Readouts
NOTE: The availability of the digital readout information corresponds with the view
selected and the accessory attached.