Lowrance HOOK2 X series, Operator'S Manual

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Depth offset
All transducers measure water depth from the transducer to the
bottom. As a result, water depth readings do not account for the
distance from the transducer to the lowest point of the boat (for
example; bottom of the keel, rudder, or skeg) in the water or from
the transducer to the water surface.
Before setting the offset, measure the distance from the transducer
to the lowest point of the boat in the water or from the transducer
to the water surface.
A
B
A
Lowest point of vessel offset: Set the distance from the
transducer to the lowest point of the boat in the water - this
should be set as a negative value. For example, - 0.3 m (-1 ft).
B
Depth below surface (waterline) offset: Set the distance from
the transducer to the surface - this should be set as a
positive value. For example, +0.5 m (+1.77 ft).
For depth below transducer, set the offset to 0.
Sonar | Hook² X Series Operator Manual
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