B&G Vulcan Series, Руководство оператора

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Warning:
Adjustments to the transducer angle value
should be done with caution. Large variations in the
transducer angle value can distort depth data,
increasing the risk of striking underwater obstructions.
Depth offset
This is a value that can be entered on the Echo Installation page to
make depth readings relate to any point from the water surface, to
the deepest point of the vessel. Below are some alternative ways in
which the offset can be entered:
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) For depth below keel: Set the distance from transducer to the
bottom of the keel - this should be set as a negative value. For
example, -2.0.
B) For depth below transducer: no offset required (the offset is set to
0).
C) For depth below surface (waterline): Set the distance from
transducer to the surface - this should be set as a positive value. For
e0.5.
A B C
+0.5
+0.0
-2.0
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ForwardScan | Vulcan Series Operator Manual