A Stanford team has demonstrated a unique system that can generate a strong sonar wave, and read and interpret the reflected signals, from an airborne platform. This raises the possibility of sonar-enabled drones that could finally map the sea floor.

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Two heavyweights in high-performance battery tech are teaming to create the world's first lithium-sulfur battery-powered luxury boat. Williams Advanced Engineering and Oxis Energy will collaborate to get the cutting edge, 400-kWh e-boat out on the water.

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Austrian boatbuilder Silent Yachts has already gained a fair bit of attention with its solar electric catamarans. Its just-announced latest model should continue that trend, as it's the result of a partnership with automakers Volkswagen and Cupra.

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If you're on a secret military diving mission, chances are you don't want the enemy to see you getting into the water. That's where VICTA comes in, as it's a diver delivery boat that transforms into a submarine.

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This concept ship, due to sail in 2024, can carry 7,000 cars across the Atlantic in 12 days. It's some 50% slower on average than a comparable diesel ship, but burns next to no fuel thanks to its five colossal wing sails, saving money and emissions.

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After focusing on speed with the launch of the Leisure 28 Electric in March, Rand has opted to take things a little easier for its latest model. The Mana 23 offers displacement cruising for 10 passengers at 5 knots for up to 100 nautical miles.

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Last September, Canada's Taiga Motors hit the water with a sexy US$24,000 carbon-bodied electric Jet Ski named the Orca. Now the company has put two more models up for pre-order, with prices starting at $15,000.

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Japanese Diesel engine manufacturer Yanmar has signaled its intention to bring hydrogen fuel cells to the consumer marine market, collaborating with Toyota to develop the technology and prototype it in a small boat by the end of the year.

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Dutch submersible maker U-Boat Worx has unveiled what's claimed to be the lightest manned submersible ever built. The Nemo can be towed on a trailer by car for launch from shore, or hauled onto a yacht for underwater fun at sea.

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