Kongsberg Seapath 320, Руководство по установке, Страница: 47 / 152

Installation Manual
M300-62/rev.2 31
The HMI Unit and the monitor should be mounted close to each other to reduce the
length of the VGA cable.
It is recommended that the area around the unit is kept free from dust and static
electricity.
3.3 Survey of sensors on vessels
All sensors need to be surveyed. The points to measure on the various sensors (MRU,
GNSS antenna, gyro), and the accuracy requirements, depend on the function of the
sensor.
If a sensor has a defined direction (fwd/stb/up), the direction in which it is mounted
must be determined.
All available sensors can be surveyed either in dock or alongside.
3.3.1 Vessel reference system
All vessels must have a defined Cartesian coordinate system to which all sensors must
be referenced. This system should be well described in both text and drawings to avoid
common misunderstandings.
Such a coordinate system can consist of a Y-axis (positive forwards) which is parallel to
the centre line of the vessel, an X-axis (positive to starboard) and a Z-axis (positive
upwards). All axes are mutually perpendicular.
The origin, where Y=0, X=0 and Z=0 (CRP, or Common Reference Point), is normally
defined to be at the AP (centre Rudder Stock, underside keel), which is also where the
design origin is commonly located in GA drawings.
The reference plane of this system must be well defined and described. This can be a
Best Fit Plane top main deck or a Best Fit Plane through the draught marks on the hull.
This is particularly important on a floating vessel, as it is not possible to project the
horizontal plane from land.
Note
If the CRP is to be located at the Centre of Gravity (COG), the load
conditions used when defining the COG must be known, as the actual
COG moves dynamically depending on load conditions of the vessel.
3.3.2 MRU
The following is to be surveyed:
Position (X,Y,Z) of sensor point (e.g. for an MRU 5 use centre top chassis)
Mounting angles:
Yaw (heading)