Cellula’s Envoy AUV sets 2,000 km submerged record on hydrogen fuel cells

On 2026-04-29, Cellula Robotics said its Envoy autonomous underwater vehicle exceeded 2,023 km submerged over 385 hours using hydrogen fuel cell power. The company said the result, developed with Infinity Fuel Cell and Hydrogen, demonstrates long-endurance autonomous subsea operations in a real underwater mission profile. The milestone highlights a strategic underwater propulsion and persistence capability with potential dual-use relevance.