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.
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ForwardScan | NSS evo3 Operator Manual