Kongsberg Simrad SN90, Installation Manual

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4 On the left side of the
Installation
dialog box, click
Units
.
Observe that the relevant options are shown on the
Units
page. You can adjust the
measurement units for:
• Depth
• Distance
• Length
• Speed
• Temperature
5 Make the necessary adjustments.
6 Click
OK
to save the chosen settings and close the dialog box.
Defining the Sonar Reference Point
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.
To do this, you must establish one or more common reference points. This reference
point is also used to position the sonar echoes relative to the ship symbol on the SN90
presentation.
Prerequisites
For accurate ship dimensions, you will need the detailed vessel drawings.
Context
On the
Ship
page, you can use the ship's physical dimensions to create a virtual reference
point (an origin) in a dedicated coordinate system for the SN90. This "default" 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 wish to change this position, you can do this by adding 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.
Setting to work