Cellula Robotics Ltd has demonstrated more than 2,000 km of fully submerged endurance with its Envoy Autonomous Underwater Vehicle (AUV), powered by a hydrogen fuel cell, exceeding the platform's published performance specification in a representative underwater mission profile.

Completed fully submerged, the mission provides a realistic indication of usable underwater range beyond a straight-line transit figure. Over the course of the profile, the Envoy AUV executed more than 4,000 turns and maneuvers, each of which increased energy demand compared with steady, linear travel.

The milestone was achieved using hydrogen fuel cell technology developed with Infinity Fuel Cell and Hydrogen, Inc., whose fuel cell solution supports Envoy's long-endurance performance below the surface.