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The Keelcrab, underwater drone for cleaning and inspecting hulls

Ref: Keelcrab-01

Underwater drone for cleaning and inspecting hulls. The Keelcrab is the first of a new generation of underwater drones devised and manufactured in Italy that performs automated cleaning and hull inspection operations. It is characterized by an exoskeleton in plastic material with neutral hydrostatic balance. The drone remains attached to the hull thanks to the vacuum/aspiration force, removing any algae or typical vegetation that grows on the hull during long periods of rest in enclosed harbours.

€ 3 186
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Thanks to its rubber or PVA brushes on tracks the drone easily moves in all directions on any surface. The high-resolution underwater camera installed on the drone allows Keelcrab to be manoeuvred via remote control with cord and may be connected to a tablet or phone. As for the cleaning aspect, KeelCrab is equipped with central counter-rotating brushes with nylon bristles of varying length and size and easily interchangeable depending on your needs. The brushes are A.N.C.C.P. certified and do not remove anti-fouling paints. On the contrary, they make them last longer: numerous tests have shown that removing the first layer of vegetation (3/5 mm) on a regular basis significantly extends the efficiency of the anti-fouling agent; this prevents barnacles from attaching to the hull in the medium term.
The drone is also provided with a nylon filter bag of varying micrometre size (optional) for the recovery of waste material, algae or vegetation, resulting from the cleaning operation.
The warranty certification is valid for 24 months. 

Technical features

  • Power supply input: 110V/220V (standard equipment – Schuko)
  • Power supply output: 24V/48V (low voltage)
  • Consumption: 2300 Watt (can also be supplied by inverter)
  • Size and weight: 42.5cm x 42.5cm x 32cm (h) weight 10kg
  • Size of the Electronics control case: 31cm x 23cm x 13 cm (h)
  • Cleaning time: 2 m²/min
  • Standard Kevlar-reinforced (120 kg traction) neutral extruded power cable that can be extended a further 20m according to specific needs
  • Replaceable brushes with different abrasive levels


  • Fast cleaning. Keelcrab cleans 2 m² per minute
  • Quick replacement of the brushes. Brushes with the different abrasive capacity to adapt to any cleaning need
  • IP68 camera and LED. HD camera and powerful LEDs allow you to monitor the hull and check the conditions

Process cleaning questions:

What is Keelcrab drone able to remove?

Keelcrab cleaning function is set to make the drone able to remove algae and vegetation; numerous tests have proven its effectiveness even on boats moored in port waters since 6-12 months

Does Keelcrab remove mussels or barnacles? If not why?

It doesn’t for valid reasons. First of all, in case such organisms grow up on hull’s surface, it could mean two things: either the anti-fouling paint used is not suitable for the waters where the boat is moored or it’s been too long since the last time the anti-fouling has been drafted on the hull’s surface. Secondly, our experience has taught us that their removal on the water could be very dangerous for the safety of the hull and for its life cycle. Such organisms normally stick so hard on the hull that their forcible removal through a large abrasion, is being able to provoke for sure the detachment of the paintings and in the worst cases this operation could compromise the physical integrity of gel coat causing as a result problem of moisture infiltration and osmosis. In such cases, there’s no other solution but to take the boat out of the water and to let the dockyard make the standard cleaning cycle usually performer by raising the boat with a crane.

Can I potentially clean all the hull’s surface using Keelcrab?

In terms of percentage, Keelcrab is able to clean 80/90% of the hull of a sailboat and motorboat with planing hull by 40 feet and up leaving to the shipowner or professionals the shafts, propellers, rudders and corners

How many times do I need to use Keelcrab?

It depends on several factors such as the temperature and the type of water, the presence of freshwater tributaries and seasonality. However, our experience allows us to say that if water temperature exceeds 22/23 degrees it is advisable to use it even once a month.

Does Keelcrab remove antifouling paint?

Our certificated BRUSHES (A.N.C.C.P.) confirms that Keelcrab has the best respect for all fixed matrix anti-fouling and indeed its use prolongs the useful life of the chemical product because over time we remove the first layers of vegetation we keep the paint in direct contact with water. In the case of self-smoothing or mixed paints, the removal of the central brush is obligatory. The sucking effort of Keelcrab, in that case, has the double effects of maintaining Keelcrab in adherence and cleaning capacity. Our tests show how the use of Keelcrab without a brush (comparing the force of suction in kg and speed of advancement) simulate the navigation of about 2-3 knots and a means of advancement, stimulating the natural self-cleaning process of these paintings.


Please allow 3-5 business days for preparing the order to ship. Due to the current situation, some shipments and deliveries may be delayed for a few days. We appreciate your patience and understanding.

The Keelcrab, underwater drone for cleaning and inspecting hulls
The Keelcrab, underwater drone for cleaning and inspecting hulls


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