Although pedal-powered boats do exist, most use either a propeller or flapping fins. Ben Kilner's one-off Jamima Paddleduck takes a different approach, with two rear paddles mounted on a bike frame – and the setup has some definite selling points.

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Artemis Technologies has launched what is claimed to be the world's first commercially viable all-electric foiling workboat, which cuts through the water at up to 34 knots and offers a per-charge cruising range of up to 60 nautical miles.

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China christened a remarkable new 290-foot ship last week – the world's first semi-autonomous drone carrier. It'll carry, launch, recover and co-ordinate the actions of more than 50 other autonomous aerial, surface and underwater vehicles.

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California's Marine Advanced Robotics has made considerable progress on its remarkable Wave-Adaptive Modular Vessel since we first saw these wild suspension-legged spider-boats 16 years ago on a list of urban legends.

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Several groups in Japan have been demonstrating fully autonomous ships in the last few months, and the latest, a 95-m container ship, has just completed a 790-km autonomous voyage starting and ending in the heavily congested waters of Tokyo Bay.

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If you've ever gone out on a booze cruise and thought "gee, I wish there was less fresh air," this one's for you! Dutch submarine company U-Boat Worx has announced an enormous new underwater venue for up to 120 guests plus a full crew and staff.

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While AUVs (autonomous underwater vehicles) are invaluable for gathering oceanographic data, they also tend to be fairly large and very expensive. The Hydrus offers a much smaller, less costly alternative, which still packs a lot of punch.

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Stand-up paddle boards certainly can be fun, but kayaks are generally a faster, more efficient means of getting around. Watercraft company Bote has now combined the best features of both, in its redesigned Rackham Aero paddle board.

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Puerto Rican startup Lift has introduced its third-generation eFoil, offering customers a cheaper point of entry to the young but burgeoning watersport, along with a smoother ride courtesy of a redesigned fiberglass deck.

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Going from water sports to luxury cruising, Ingenity has followed up its Super Air Nautique 22E electric sport boat with the 23E day boat. The new day cruiser can spend up to 14 hours on the water and offers a spacious, triple-lounge deck for 11 people.

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