High-Pressure Water Cleaning vs Brush Cleaning

ROV (Remote Operated Vehicle) vs Diver Operated Cart


This topic is debateable in every aspect except when it comes to being environmentally compliant. Comparing High-Pressure Water Cleaning vs Brush Cleaning Systems as well as the comparison of ROV vs Diver operated carts, the following must be clearly understood.


The key element in any design is to find a methodology to match the forces required (Shear Force) in Underwater Hull Cleaning to overcome the adhesion strength of marine organisms. These forces must be adjustable to compensate for the varied adhesion strengths of Marine Organisms as well as the various Anti-Fouling coating types.


Consideration in the Design:


High Pressure Water jets vs brush

-        Using High-Pressure Water Jets makes the removal process of "containment and extraction" of biofouling arduous. Owing to the pressure differential between vacuumed area and water pressure not being great enough to be effective in a high rate of capture.

-        Whereas the brush cleaning methodology displaces the water creating a natural vacuum and allowing for a large percentage capture and extraction of the biofouling to the filtration system

-        High pressure water jets are unable to obtain the high shear force required to overcome the adhesion force of the biofouling organisms on the hull. Hence the inability to remove macro-fouling.

-        Whereas the brush cleaning methodology can adjust to the required shear force to overcome the adhesion force of the organisms. Hence its ability to remove micro and macro biofouling.


ROV Hull Cleaning Carts vs Diver Operated Vacu-Cart

One needs to be mindful of how a High-Pressure Water Jet System ROV adheres to the hull surface vs Diver Operated Brush Vacu-Cart System's adherence to the hull surface.

-        With the ROV, thrusters are used to manoeuvre the cart towards the vessel, of which are also used to keep the cart attached to the vessel by means of a suction force. This exact suction force is extracting the Alien Invasive Species directly from the surrounding biofouling and dispersing them through the thruster discharge/outlet into the surrounding water before they can be captured, contained, and neutralised. This contrasts with the IMO and BIMCO requirements and standards of capture, containment, and neutralising of the translocated Alien Invasive Species.

-        Contrary to the above mentioned design, the Diver Operated Vacu-Cart is manoeuvred onto the hull by the diver. The centralised vacuum system and brush rotational water displacement technology creates a vacuum onto the vessel hull. This methodology automatically creates a capture and containment of the alien invasive species preventing any biodiversity.

The objective is to create a vacuum and containment area within the cart to not be reliant on the thrusters for suction to adhere the cart to the vessel. These are environmental problems that need to be solved which are currently being overlooked by creative marketing.