10.4.3 User Manual Contents April 17, 2020
Firmware: 5.2.1 Page 13 of 142
1.10
Hull mounted and bio-fouled systems cleaning procedure
The procedures below outline the safe way to clean hull mounted systems or those with extreme
biofouling. Please ensure that these steps are followed exactly as outlined, as failure to do so could
result in damage to your system. If there are any questions or doubts about these procedures contact
NORBIT support.
CAUTION: Do NOT use Power Washer
If cleaning a hull mounted system, a power washer must not be used. This
will irreparably damage the system. If hauling out the vessel for hull cleaning,
ensure that those cleaning the hull are informed about not putting any part of
the power washer stream on the NORBIT system.
CAUTION: Superfine Abrasives Only
When using scrubbing pads on the NORBIT, ensure that you are using a
super fine abrasive pad such as 3M™ Scotch-Brite™ Light Cleansing Hand
Pad 7445. A very abrasive scrubbing pad will damage the polyurethane on
the sonar.
1. Remove the system from the vessel and place water and
dust resistant caps on the sonar bulkhead as well as the end
of the cable.
2. Manually remove as much fouling from the sonar as
possible.
3. Obtain a bucket large enough to fit the entirety of the sonar.
In the container, mix in a 50/50 ratio of CLR® (Calcium,
Lime, Rust cleaner) to water.
4. With the bulkhead cap tightened, completely submerge the
system in the 50/50 solution for approximately 2 hours.
5. Remove the sonar from the solution and scrub the sonar
using a super fine abrasive pad and water.
6. If the system still has fouling, repeat the soaking process.
This process can be repeated until all biofouling has been
removed from the system.
7. Allow the system to dry fully prior to storage.
Cleaning of system with a
power washer, causing
exposure of the ceramics.
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