System diagram
The system diagram identifies the main components of a basic FX80 system. Only the main connections between the units are shown. Detailed interface capabilities and power cables are not shown.
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The system comprises the following units and main parts:
A Colour display(s)
B Processor Unit (computer)
C Bridge Control Unit
D Commercial third-wire cable on a winch (not supplied by Simrad)
E Trawl Unit (includes Communication Hub and the Sonar Head for the DFS75 Trawl Sonar)
F Fourth-wire cable between the Trawl Unit and the Camera Unit (a winch is recommended for cables longer than approximately 60 meters)
G Camera Unit with camera and LED lamp (including Y-split cable)
Note
The system requires only one Camera Unit, but several models are available. Two different models of the FX80 Camera Unit are shown here for illustrative purposes.
The FX80 Camera Unit (containing the camera and LED lamp) can be remotely mounted on the trawl up to 600 meters from the headrope. In these cases there is a need for a fourth-wire winch to handle this cable. This winch needs to be installed on deck in a practical location as the (up to) 600 meters of cable will be spooled entirely off and then back on with each tow. In applications where the camera is located on a kite or at the headrope, there is no need for this cable and winch. This fourth wire is supplied by Simrad. The required length can be decided at the time of purchase, or lengths can be added at a later time. The system itself is not set for any particular length.
The number of displays must be chosen to fit the preferences of the crew. Many users prefer separate displays for the trawl sonar and the live video feed.
Note
Displays are not included in the standard delivery from Simrad. These are commercial items that can be purchased locally. The winch system on the trawl deck and the third-wire cable must also be provided by a third-party manufacturer.