Splash247: CTM taps in-transit hull cleaning robots

Monaco-based dry bulk pool giant C Transport Maritime (CTM) has invested in CRABI Robotics, a US-based startup developing an autonomous hull cleaning system aimed at tackling biofouling while ships remain in transit.

The partnership will also see CTM serve as a pilot partner, helping the robotics firm bring its in-transit hull cleaning technology closer to commercial deployment.

CRABI, short for Crud Removal Autonomous Brushing Instrument, is a magnetically attached robotic system designed to scrub biofouling from ship hulls while underway, eliminating the need for cleaning during port stays or drydock.

According to CRABI Robotics, hull biofouling contributes to $25bn in excess fuel costs annually and adds 100m tonnes of CO₂ emissions worldwide. The system aims to tackle both problems head-on by delivering frequent, non-invasive cleanings without off-hire or disruption to operations.

“Our magnetically-attached robot is designed to function in transit, handling complex navigation and harsh underwater conditions to keep vessels clean and efficient,” said the Cambridge, Massachusetts-based startup, which was founded in 2023 and has already run sea trials in Boston Harbor, maintaining hull contact at nearly 10 knots.

CTM described the collaboration as a step in its wider decarbonisation strategy, adding that it shows a commitment to backing “practical innovation” with real fuel-saving potential.

By combining continuous cleaning and hull inspection, CRABI claims its system ensures consistent fuel efficiency for ship operators, helping them meet rising environmental targets without operational downtime.

Further trials are expected aboard CTM-managed vessels as development continues toward full-scale rollout.