Kongsberg Simrad ST90, Reference Manual

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Ship page
On the
Ship
page you define a specific reference point ( Ship Origin or origo ) for the various
sensor connected to the ST90 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.
Description
On the
Ship
page you can use the ship's physical dimensions to create a virtual reference
point (the Shop Origin ) in a dedicated coordinate system for the ST90 system. The Ship
Origin is normally located in the following position:
•
X position
: Half the ship's length
•
Y position
: Half the ship's width
•
Z position
: On the waterline
If you want to change the location of the Ship Origin , you can do this by providing offset
values in the X, Y and/or Z directions. To do this you will need the ship drawings.
Note
We recommend that you place the Ship Origin at the same position as the motion reference
unit (MRU). This will minimize the vectors when your vessel is moving. Use the vessel
drawings to establish the offset values between the basic position of the Ship Origin and
the MRU location.
Details
X Offset
Select the offset value on
the X axis (fore-and-aft
direction) from the default
Ship Origin . This is the
origin that was defined by
the vessel designer and/or
the shipyard when the vessel
was built. Adjust with a
positive value for X if your
new preferred origin is located ahead of the default
Ship Origin .
Functions and dialog boxes