Hydrogen-powered submarine drone completes 1,257-mile mission without surfacing

The hydrogen-fuelled sub. PIC COURTESY/Cellula Robotics

A submarine drone has traveled more than 1257 miles fully submerged, powered by hydrogen fuel cells, and completed a 385-hour mission without surfacing.

Built by Cellula Robotics in British Columbia, Canada, the Envoy autonomous underwater vehicle (AUV) measures about 27.9 feet in length and 3.3 feet in diameter.

It has a displacement of about 8160 lbs (3700 kg). Smaller configurations are also available.

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