Simrad SC90, Installation Manual

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419050/B
a From the vessel drawings, extract the relevant offset information, and insert
those values.
Do this as accurately as possible.
b Record the information in the result table.
5 Select
OK
to save the settings and close each parameter dialog box.
Result
Transducer offsets
X-offset
Y-offset
Defining the installation parameters for the global positioning
system (GPS) antenna
Information from a few key sensors are vital for the SC90 accuracy. In order to achieve
maximum accuracy, the physical locations of these sensors - normally referred to the
Ship Origin - must be recorded in the SC90 setup. For future reference, the offset values
for each sensor is recorded.
Prerequisites
For the accurate locations of the transducer and the global positioning system (GPS)
antenna, you need the detailed vessel drawings. The information about the installation
angles must be retrieved from the reports provided by the personnel that did the actual
installation.
Neither tools nor instruments are required. The SC90 is turned on, and it is working
normally.
Context
The physical location of the global positioning system (GPS) antenna relative to the
transducer is required to allow the SC90 to show the correct navigational information in
the SC90 presentation. The locations of the transducer and the Global Positioning System
(GPS) antenna must be referenced to a common
Ship Origin . For the SC90, the Ship
Origin is positioned at the vessel’s stern. This is necessary to get the
Own ship
and
Seine
markers positioned on the vessel’s track line, which is generated from the vessel’s stern.
The physical location of the motion reference unit (MRU) is not important for the SC90
operation. Only the roll and pitch outputs are used, and these are not location dependant.
Procedure
1 Observe the
Status
parameter dialog box in the bottom right corner of the SC90
presentation.
Simrad SC90 Installation Manual