A Critical zone
B Warning zone
Warning forward range and warning depth
Set the warning forward range and warning depth thresholds that define the warning zone
lines shown on the ForwardScan image.
Offset angle
The offset angle is used to fine tune the transducer angle if the transducer is not installed
parallel to the waterline.
If the mounting angle of the transducer is off, the image can be misrepresented.
The angle can be adjusted from 0 (vertical) to 20°.
Warning: Adjustments to the offset angle value should be done with
caution. Large variations in the offset angle value can distort depth data,
increasing the risk of striking underwater obstructions.
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 in the water or from the transducer to the water surface.
• To show the depth from the lowest point of the vessel to the bottom, set the offset equal
to the vertical distance between the transducer and the lowest part of the vessel, A
(negative value).
• To show the depth from the water surface to the bottom, set the offset equal to the
vertical distance between the transducer and the water surface, B (positive value)
• For depth below transducer, set the offset to 0.
ForwardScan| NSS evo3S Operator Manual
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