Kongsberg Simrad EK80, Installation Manual

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Note
Calibration must be taken seriously. The final verification of correct installation can only
be done during calibration at sea. Installation and operational parameters that do not
meet the accuracy requirements may lead to a malfunctioning EK80 system. To achieve
the best results, the calibration must be planned and done carefully. If the accuracy
requirements are not met, and this is found to be the reason for a malfunctioning system,
the vessel will most likely need to be dry docked in order to repeat the dimensional survey.
Related topics
Dimensional surveying, page 176
Surveying the transducer and the navigation
sensors
An overall procedure specifying the main tasks is provided. The detailed knowledge
about how to do the measurements is offered by the consultants doing the work.
Prerequisites
Determining the relative positions and orientations of the sensors and the transducer with
high accuracy is important. This requires professional surveying done by qualified
and trained personnel using proven equipment and methods for maritime dimensional
surveying. 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.
We strongly recommend that you make the dimensional survey measurements when
the vessel is in dry dock.
Context
All measurements must be made after the installation of the transducer and the navigation
sensors The following measurements must be made for each sensor:
• Physical position with reference to the vessel coordinate system (X, Y and Z) and
the chosen origin.
• Angular values (pitch and roll)
• Heading with reference to the centre line
Dimensional surveying