Kongsberg Simrad ES80, Руководство по установке, Страница: 187 / 312

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• Define a vessel coordinate system, and place all the sensors in it.
Dimensional surveying
The dimensional surveying tasks recommended for ES80 include:
• Define the vessel coordinate system.
The vessel coordinate system is established to define the relative physical locations of
systems and sensors. When you have several different sensors and transducers on your
vessel, and you wish each of them to provide accurate data, you need to know their
relative physical positions.
• Define the location of the origin in the coordinate system.
The origin is the common reference point where all three axis in the vessel coordinate
system meet. All physical locations of the vessel’s sensors (radar and positioning
system antennas, echo sounder and sonar transducers, motion reference units, etc.) are
referenced to the origin.
• Define the vessel’s centre line.
• Measure the physical location of each sensor (or sensor antenna).
By means of the vessel coordinate system, the physical location of every sensor can
be defined using three numerical values for X, Y and Z. These values must define the
vertical and horizontal distances from a single reference point; the origin. The accuracy
of the three numerical values for X, Y and Z defines the accuracy of the sensor data.
• Measure the physical location and orientation of each sensor (or sensor antenna). Place it
in the coordinate system.
Measure the physical location of each transducer. Place it in the coordinate system.
Related topics
Vessel coordinate system, page 189
Placing each sensor in the vessel coordinate system, page 184
Surveying the transducer and the navigation sensors
An overall procedure specifying the main tasks is provided. It is not within the scope of
this publication to provide detailed instructions for dimensional surveying. Consult the
installation shipyard and/or a naval architect if you need detailed instructions.
Prerequisites
For accurate ship dimensions you need the detailed vessel drawings.
Setting to work