{"id":36578,"date":"2026-09-09T18:52:00","date_gmt":"2026-09-09T22:52:00","guid":{"rendered":"https:\/\/www.ecoticias.com\/en\/?p=36578"},"modified":"2026-09-09T06:39:47","modified_gmt":"2026-09-09T10:39:47","slug":"a-46-foot-robot-boat-found-a-distress-beacon-off-plymouth-and-its-steady-hull-may-matter-more-to-navies-than-hydrogen","status":"publish","type":"post","link":"https:\/\/www.ecoticias.com\/en\/a-46-foot-robot-boat-found-a-distress-beacon-off-plymouth-and-its-steady-hull-may-matter-more-to-navies-than-hydrogen\/36578\/","title":{"rendered":"A 46-foot robot boat found a distress beacon off Plymouth, and its steady hull may matter more to navies than hydrogen"},"content":{"rendered":"\n

Working at about 16 to 20 nautical miles off the coast of Plymouth, England, a 46-foot uncrewed vessel<\/a>spent more than 100 hours<\/a> labouring between storms, 6.5 feet high waves and temperatures above 95\u00b0F. Additionally it observed a low-power personal detector beacon which was 13.7 miles away, zeroing in on it with a 65 feet margin of error.<\/p>\n\n\n\n

The task seems like an example of an ultramodern marine fuel. Nonetheless, Pioneer, the ship constructed by ACUA Ocean to prove hydrogen propulsion<\/a>, is equipped with a traditional diesel-electric system. This is not because of a fragile combustible unit, but rather because of an endurance gap, which is of around 18 days on hydrogen, and above 50 days on diesel.<\/p>\n\n\n\n

\"ACUA
Pioneer operates offshore with its distinctive SWATH configuration visible above the water. ACUA says the design reduces vessel motion, providing a steadier platform for sensors, antennas and other equipment.<\/figcaption><\/figure>\n\n\n\n

The issue was modified by the efficiency difference<\/h2>\n\n\n\n

As stated by the company, in August 2025 Pioneer achieved a remotely operated, 24-hour hydrogen mission<\/a> leading to the Eddystone Lighthouse and back, without emitting any contaminant exhaust. Although it was an impressive evidence of the idea, the same framework, travelling at 4 knots, could stay at sea for 18 days with hydrogen or 50 days with diesel.<\/p>\n\n\n\n

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Read More: Scientists dripped 3,000 charged water drops onto Teflon-coated copper and the metal underneath began to corrode, and some of those drops had simply slid off an ordinary houseplant leaf<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n

According to ACUA, the tailored 45-kilowatt Nuvera fuel cell<\/a> has a thermal efficiency of 58%, while hydrogen requires up to 9 high-pressure cylinders at 350 bar. On the other hand, diesel fits into around 4,000 liters of liquid storage, providing a ship with an autonomy of about 5,000 nautical miles. The amount of storage required on a 46-foot boat, is further modified.<\/p>\n\n\n\n

The SWATH hull is what buyers really want<\/h2>\n\n\n\n

Short for Small Waterplane Area Twin Hull, Pioneer uses a SWATH design, which is what makes this slow-moving ship useful. Having two underwater pontoons shaped like torpedoes, the deck is supported by 4 narrow struts which rise through the surface.<\/p>\n\n\n\n

Being at its strongest near the surface, wave energy is reduced with depth, this means that depending on how much of the floating structure lies below the waterline determines how much the sea can push the boat around. Pioneer could perform better at seakeeping than a monohull ship three times as long and 10 times as heavy, according to tests by the University of Southampton and its Wolfson Unit<\/a>. ACUA recorded 60% reduced rolling and maximum roll speeds up to 4 times lower in 13.9-foot waves, compared to analogous monohulls.<\/p>\n\n\n\n

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