Kongsberg Simrad CP200-5C, Installation Manual, Page: 11 / 110

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• Dimensional surveying
• Calibration
The alignment and dimensional surveying must be done after the transducer installation with
the vessel still in dry dock. The calibration of the acoustic doppler current profiler (ADCP)
functionality is normally done at sea immediately after leaving dry dock.
Alignment
The alignment tasks required for the CP200-5C transducer include:
• Measure the transducer to ensure that it has been mounted horizontally with a slight
inclination angle.
• Measure the transducer to ensure that it has been oriented correctly in parallel with the
keel.
Dimensional surveying
Determining the relative positions and orientations of the sensors and the transducer is
important to obtain highly accurate data. The dimensional surveying tasks recommended for
the CP200-5C transducer include:
• Define the vessel coordinate system.
The vessel coordinate system is established to define the relative physical locations of
system units 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 and orientation 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 the transducer. Place it in the coordinate
system.
The information provided by the dimensional survey is entered into the CP200-5C software
as installation parameters.
Introduction