Determining the location and installation angles of the transducer
The physical location and the installation angles of the MS70 transducer are important for the MS70 data accuracy.
Prerequisites
In order to do this task, the following prerequisites must be met.
•  The vessel is in dry dock.
•  All relevant vessel drawings are available.
Context
In order to obtain precision data that are both detailed and correct, it is necessary to align the transducer, and measure its location and offset in relation to the vessel’s coordinate system. Modest accuracy requirements apply when your MS70 system is only used to investigate objects in the water column.
Determining the relative positions and orientations of the sensors and the transducer with high accuracy is important. This requires professional land surveying done by qualified and trained surveyors using proven survey equipment and methods . We recommend that you use third party consultants with well proven experience with vessel dimensional control. Sufficient time and satisfactory work conditions must be given to the survey work. The installation engineers from Kongsberg Maritime are neither equipped nor trained to do dimensional surveying.
Procedure
1 Obtain the transducer installation drawings.
2 Extract the information related to transducer position and installation angles.
3 Check the information by making the relevant measurements under the hull.
4 Fill in the result tables.
Result
Installation angles
Rotation Around X Rotation Around Y Rotation Around Z
 
 
   
Location in the vessel’s coordinate system
Forward (X-axis) Starboard (Y-axis) Downward (Z-axis)
 
 
   
Further requirements
Do a dimensional survey to determine the necessary position and angle measurements of the transducer and the relevant sensors. The information provided by the dimensional survey is entered into the MS70 software as installation parameters.