The Keelcrab

What is The Keelcrab?

Underwater drone for maintenance and inspection of yacht hulls and pleasure boats.

Accessories included:

  • HD camera and two LEDs of 280 lm each (total 560 lm)
  • Remote control with joystick, 7” display and 7 meter long cable
  • Drone cable 20 meters (specific gravity 1190 kg/m3)
  • External power supply box (INPUT 100/240V AC)
  • A.N.C.C.P. certified soft nylon counter-rotating brush
  • KIT waterline approach

THE KEELCRAB is the first of the new generation of underwater drones entirely designed and made in Italy (100% made in italy) to perform Robotic hull cleaning and inspection activities. Characterized by a plastic exoskeleton with neutral hydrostatic buoyancy, it is maintained in perfect adherence to the hull thanks to a major suction effect generated by a powerful marinized pump motor, removing and sucking up algae or vegetation that typically builds up on the live work of boats during periods of standing in closed waters.

The movement of the drone is provided by natural rubber or P.V.A. brushes driven by tracks that allow easy maneuvering in all directions, over any surface and making the drone adept at overcoming obstacles. High-resolution underwater camera allows the drone to be operated by wired remote control with video stream display on 7-inch display, tablet or phone (optional) in high resolution. In terms of cleaning capability, the drone is equipped with nylon inset counter-rotating center brushes (with variable length and diameter) that are easily interchangeable according to the needs of abrasion. These A.N.C.C.P. certified brushes. , with proper set-up i.e., following the directions in our instruction manuals, do not remove antifouling paints but rather extend their effect over time.

Numerous tests have shown that the constant removal of the first layer of vegetation (3/5 mm) causes a drastic extension of the useful life of the antifouling (which returns to direct contact with the water), which results in the ‘impossibility of the formation of “dog teeth” (barnacles) in the medium term, decreased fuel consumption (and related emissions) and maintenance of top sailing performance (due to less friction of the hull on the water).

The drone is also equipped with a keelcrab bag filtration system (optional) with variable micrometer nylon filter bag for the recovery of waste material, algae or vegetation, resulting from the cleaning operation.

The product warranty certificate is valid for 24 months (excluding consumables) or 500 hours of use.

  • Input power supply: 100/240V AC (standard equipment with Schuko plug). Can also be powered by inverter.
  • Output power supply: 26.5V DC (low voltage)
  • Power consumption: 350 W (also conveniently powered by inverter)
  • Size & weight: 45.5cm x 43cm x 30cm (h) weight 10kg (approx.)
  • External power box dimensions: 30cm x 22cm x 12cm (h)
  • Cleaning capacity: 7 m²/min
  • Drone power cable: 20 m long (extendable according to specific requirements); breaking load 160 kg (in tension)
  • Replaceable brushes with different abrasive force
  • Weight: 10kg;
  • Length: 45.5 cm;
  • Width: 43 cm;
  • Height: 30 cm;
  • Cleaning capacity: 7 m²/min.


*vat and shipping not included


€ 3.886,00


*vat and shipping not included


€ 3.886,00

The advantages


Quick cleaning

Keelcrab cleans 2 m² per minute


IP68 camera and LED

HD camera and powerful LEDs allow you to monitor the hull and check the condition


Fast replacement of brushes

Brushes with different abrasive capacity to suit any cleaning need

You might also be interested in:

Ultrasonic antifouling.

Complete solution for hull maintenance and vegetation prevention.

“Crew” of boat owners or boat neighbors who share the same passions and needs? Group purchasing through KEELCRAB SHARING with attractive customer benefits!

Extra accessories

Perfect for moving between docks but also for keeping your Keelcrab and electronics safe and secure inside your lockers.

Its bristles remove algae or vegetation and fouling principles above (1-3mm).

Its bristles remove algae or vegetation and encrustation above (3-5 mm).

Filter holder frame with supplied 180-micron nylon thread filter (optional 50 micron or possible customization of filter capacity)

10-meter extension cable and related IP69 watertight connectors to bring the drone power cable to 30 meters total length.

Frequently asked questions

The keelcrab drone is designed to have a cleaning capability classifiable as a “routine maintenance” of your hull respecting the surfaces, chemicals and technical elements on the living work. Since there is no scale (benchmark) with regard to the ability to abrade and remove dirt that has taken root to a boat hull, we start with the mechanical concept that the drone exerts 3.5 kg of thrust (when fully submerged) toward the hull surface and moves in counter-rotation (counter-rotation effect) a cylindrical inset brush body made of nylon (of 2 different weights) or corrugated stainless steel. Micrometric tests (pre and post robot passage) in a simulated environment (including with wastewater analysis) and practical feedback led us to obtain certification from A.N.C.C.P and to demonstrate that: complying with the starting condition of “perfectly clean boat” and “painted” with new antifouling, a hull is “still on target” (still workable i.e., cleanable by the keelcrab drone) even after a period of 6 to 8 months of complete stationing in port waters.

In the case of paints that are even partially water-soluble (self-sanding) if navigation was not possible, in order to avoid micrometer reduction of antifouling when using the drone, use is constrained to the removal of the central brush body, leaving the dual tasks of keeping the machine in adherence and sucking up silt algae or vegetation to the suction capacity alone. The proportion between suction capacity in kg and robot feed rate, demonstrates how using keelcrab without its brush body simulates slow sailing (less than 3 knots) by stimulating the paint’s natural chemical self-cleaning process.

All consumable and non-consumable items (thus covered or not covered by warranty) are designed with the logic of “do by yourself” allowing maximum freedom and autonomy over drone assistance. Assembly and disassembly operations of individual marinized components are therefore executable by anyone and without the use of special technical equipment. In all cases, replacement or intervention operations are supported by dedicated video tutorials and you will be able to find them: in the restricted area of our website, by sending a w.up to +39 327 029 5197 with a request to open a service ticket or a specific request for the consumable component you intend to replace or by sending an email to with the subject line “video tutorial for technical assistance” specifying the consumable technical component you intend to replace. One of our assigned technicians will follow up with you for quick troubleshooting.

The entire Keelcrab line is entirely designed and manufactured in Italy (100% made in italy) in our production facility in the province of Como, and the average delivery time is about 2 weeks from order.

  • 12-meter boat: 1 hour
  • 16-meter boat: 1 hour and 30 minutes
  • 18-meter boat: 2 hours

All consumables are:

  • Replaceable in total autonomy
  • Available h48 directly from us
  • Durations vary from a minimum of 50 hours to a maximum of 500 hours of use.

There are no other variable costs of maintaining your device in efficiency over the years.

Abundant rinsing with fresh water after each use and sheltering in a dry, sheltered place.

Keelcrab is maintained in perfect adherence to the hull thanks to a major suction effect generated by a powerful marinized pump motor by removing and sucking up algae or vegetation that typically builds up on the live work of boats during periods of dwellings in closed waters. The keelcrab drone is capable of cleaning (once quickly mastered in piloting operations) up to the 95/97% of the surface area of a displacement hull of a sailboat that exhibits characteristics of shapes and geometries classifiable as “standard” in the 10/24 meter range and 85/87% of a planing or semi-planing hull of a motorboat that exhibits characteristics of shapes and geometries classifiable as “standard” In the range 10/ 24 meters.

Here we are, send us an inquiry!