The C DISC

The C Disc™ is a mobile and highly efficient diver-operated tool for harvesting various species from the seabed.

Catch to net

In areas that are difficult to access and, as an example, very shallow water, the C Disc™ can be configured to give an extended outreach from a boat. While the diver is operating a suction nozzle that is suitable for the seabed conditions, and the targeted species, the catch is collected in nets on the tool.

CRobotics_Illustrasjon_CatchToNet.jpg Catch to net

Catch to boat.

The C Disc™ can also be configured to bring the catch directly up to the boat. The diver will be operating a suction nozzle that is suitable for the seabed conditions, and the targeted species. In this configuration, the diver can fully utilize the dive-time by focusing on the harvesting.

CRobotics_Illustrasjon_CatchToBoat.jpg Catch to boat

Catch to shore.

The C Disc™ can also be deployed from land/shore without the need for a boat for near-shore work, for easy and efficient harvesting process. The diver will be operating a suction nozzle that is suitable for the seabed conditions, and the targeted species. In this configuration, the diver can fully utilize the dive-time by focusing on the harvesting.

CRobotics_Illustrasjon_CatchToShore.jpg Catch to shore

The C Disc is tested by Norwegian Institute for Water Research (NIVA)


Highlights from the rapport.

  • The results from this trial showed that the C Disc is an efficient tool for vacuuming sea urchins. In a commercial setting the CPUE (catch rate) is higher than other methods used for collecting sea urchins, such as trapping and drag dredging.

  • Average catch rate 1,9 sea urchins per second.

  • As a tool for promoting kelp recovery by removing sea urchins, it was able to remove sea urchins to a low number, depending on substrate type.

  • There did not appear to much damage on bycatch or the urchins.

  • Encrusting and fastening organisms appeared to be less affected by the C Disc and despite being the dominant bycatch, there appeared to be only a slight removal of the dominant snails/hermit crabs.

  • The advantage of the C Disc is that the diver is able to see, and to some degree, avoid catching large organisms such as sea cucumbers.

  • The suction handle made it easier to manoeuvre in between rocks and avoid unwanted bycatch.


The C Disc is patented by C Robotics AS, Norway