In-Water Hull Service Robot Launched 

Armach Robotics’ Hull Service Robot is man-portable at under 66lbs and around 34 inches long, which greatly reduces deployment costs and increases convenience By Phoebe Grinter / 16 May 2022
In-Water Hull Service Robot Launched 

Armach Robotics, the robotic hull-cleaning subscription service company launched as a Greensea Systems Inc. spin-off, has unveiled its first post-prototype Hull Service Robot (HSR).

Armach was launched in November 2021 to capitalize on Greensea’s digital expertise to offer an industry-leading subscription model, proactive and robotic hull cleaning system using autonomy, intelligence and data fusion.

The HSR is a disruptive technology in hull cleaning, being man-portable at under 66lbs (30kgs) and around 34 inches (86cm) long, greatly reducing deployment costs and increasing convenience. This ‘Smaller, Smarter, Better’ robot was recently launched for its first in-water trials at Plymouth, Massachusetts marking an important milestone in making proactive in-water cleaning a viable solution for fuel saving and optimized ship performance.

“My favorite job in this industry is working on next-generation systems,” said James Truman, Armach’s VP of Engineering. “The team learns so much in the development and testing of a product for a new application but once a vehicle is sufficiently functional then the pace of design evolution slows dramatically. Designing the next generation, once you have a good understanding of the requirements and have developed proven key components, is an amazing opportunity.”

The original prototypes consisted of off-the-shelf navigation systems, a custom crawler skid, and a separate Remotely Operated Vehicle (ROV) all bolted together, but as Truman explains, there were more efficient ways of integrating this equipment in the finalized vehicle: “It worked well in the prototypes but was expensive and clunky. For the purpose-built Armach HSR we stripped out a lot of the structural and electrical overhead from the prototypes. That gave us a smaller, lighter, and more streamlined vehicle that can operate in faster water currents and on lower friction coatings. We’ve tested extensively to minimize hull-coating impact and will continue accelerated life testing and design iteration to ensure long term reliability”.

Greensea has extensive experience in intelligent control systems for underwater robots, which is how Armach came into being. The HSR is purpose built around the state of the art in miniaturized navigation sensors. Greensea’s OPENSEA fuses a navigation solution from the myriad sensors and provides rock-solid vehicle control.

For the HSR vehicle, Armach designed and is producing the electro-mechanical drive and cleaning components in-house because it needed not only high power-density and unique packaging but also precision control and feedback. This bespoke approach pays dividends when it comes to in-water usability and control, along with the quality of the hull data fed back.

“The resulting performance driving on a hull as well as the free-flying stability are amazing. The networked architecture and SAFEC2 functionality mean we can monitor or control the vehicles from anywhere in the world,” adds Truman.

Armach offers shipowners a proactive, autonomous in-water robotic cleaning solution. The company’s ‘Robot as a Service’ solution simply offers shipowners a constantly clean hull and following each cleaning operation provides an accurate georeferenced hull condition survey. The technology is not coating specific and is based on a state-of-the-art system, powered by Greensea’s autonomy, intelligence and data fusion technologies. Armach’s business model provides cleaning robots to ships, ports, harbors and established service providers on a monthly subscription basis.

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Posted by Phoebe Grinter Unmanned Systems Technology’s digital editor and copywriter Phoebe takes a fresh and enthusiastic approach to researching, writing and posting the latest unmanned technology updates, and in managing the UST social channels. Connect & Contact