Kongsberg Simrad SN90 Reference Manual page 578

Simrad SN90 Reference Manual
Z Offset
Select the offset value on the Z axis (vertical) from the default Ship Origin. This is
the origin that was defined by the vessel designer and/or the shipyard when the
vessel was built. Adjust with a positive value for Z if the new preferred origin is
located under the default Ship Origin.
Ship Dimensions
Insert the physical dimensions of your vessel (length and width).
Do this as accurately as possible. This information is used to create a new origin in
the vessel coordinate system.
Related topics
Inserting the installation parameters, page 214
Functions and dialog boxes, page 416
Setup menu: functions and dialog boxes, page 448
Installation Parameters page, page 574
Transducer page
Use the page to define the physical location of the transducer in the vessel
Transducer
coordinate system, as well as the installation angles (rotation). The installation angles
define in which direction the transducer face points.
Description
The physical location of the transducer is important for the echo data accuracy.
Use the centre of the transducer face as reference, and define the offset values related to
the Ship Origin. The installation angles relevant for the transducer must also be defined.
These values were recorded during the installation, and they define the direction of
the transducer face.
Note
It is very important that the transducer installation angles are measured and recorded
accurately during the installation. Incorrect angles will greatly reduce the data accuracy.
A hull unit may be provided as an option. It allows you to lower and hoist the transducer.
When this option is selected, the transducer is delivered readily mounted at the lower
end of the transducer shaft. Since the transducer is pointing straight forward, the
value is 0 (zero). However, if the hull unit has been installed with an
Rotation Around Z
unintentional rotation referred to the centre line, the
to compensate for this.
576
must be adjusted
Rotation Around Z
381294/E