Page 46: of Marine Technology Magazine (May/Jun 2026)

VESSELS & VEHICLES ¯ MacGregor ¯ Cellula Robotics cell, exceeding the platform's published performance speci? - Purpose-built for autonomous maritime patrols and interdic- cation in a representative underwater mission pro? le. tion, STORMRUNNER is powered by Sea Machines’ SM300-

Completed fully submerged, the mission provides a realistic SP Autonomous Command and Control system, delivering indication of usable underwater range beyond a straight-line high endurance, speed, and payload capacity for complex transit ? gure. Over the course of the pro? le, the Envoy AUV maritime missions. With a 40+ knot top speed, 700+ nauti- executed more than 4,000 turns and maneuvers, each of which cal mile endurance, and modular payload bay, STORMRUN- increased energy demand compared with steady, linear travel. NER provides a durable platform for advanced mission sys-

The milestone was achieved using hydrogen fuel cell tech- tems such as the Leonardo DRS M-MEP. STORMRUNNER nology developed with In? nity Fuel Cell and Hydrogen, Inc., is built from 100% high density polyethylene (HDPE) plastic.

whose fuel cell solution supports Envoy's long-endurance per- Countering unmanned aerial systems have become a grow- formance below the surface. ing and immediate requirement for defense forces particularly

For operators, endurance is what turns technical capability in the maritime domain across the globe, notably the Arabian into offshore results. Longer fully submerged missions can Gulf, Red Sea, and Baltic. Adversaries increasingly employ reduce the number of recoveries and relaunches required, sup- UAVs to surveil, disrupt, or threaten business and naval op- port mission continuity, and make better use of vessel time erations. By combining C-UAS mission equipment packages in programs where logistics, weather windows, and offshore from Leonardo DRS with Sea Machines' STORMRUNNER intervention all affect cost and execution. AUSV, naval commanders gain the ability to detect, tract, and

The Envoy AUV remained on mission for 385 hours and cov- neutralize aerial threats at sea, without placing sailors or high ered 2,023 km submerged on hydrogen fuel cell power. The value maritime assets at risk.

result demonstrates persistent, long-range AUV performance in a real underwater operating context and reinforces hydro- ¯ MacGregor to Supply Deck Machinery for Ultra-Large gen fuel cells as a practical enabling technology for extended Cable-Laying Vessel autonomous subsea operations. MacGregor has been selected to supply a comprehensive

While on mission, Envoy's hydrogen fuel cell system gener- package of offshore and merchant deck machinery for ultra- ated water as a by-product, underscoring the lower-emission large cable-laying vessels. The vessel will be constructed at potential of fuel cell-powered subsea operations alongside Tersan Shipyard in Turkey.

their endurance bene? ts The contract, secured in close collaboration with Nemo

Marine, was booked during Q1 2026, with delivery sched- ¯ Leonardo DRS Selects Sea Machines' STORMRUN- uled for 2027.

NER AUSV For Maritime Counter-UAS Solution The specialized package is designed to support the vessel's

Sea Machines Robotics announced that Leonardo DRS has operational requirements: selected their new eight-meter offshore class of autonomous • Offshore Deck Machinery: Essential equipment tai- unmanned surface vessel (AUSV) developed for the defense- lored speci? cally for cable-laying activities.

market to demonstrate their maritime mission equipment • Merchant Deck Machinery: High-performance ves- package (M-MEP) for counter-unmanned aerial system (C- sel-moving winches designed for critical functions, including

UAS) missions. anchoring at roadsteads and ensuring safe mooring in ports.

46 May/June 2026

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