Marine

These strangely-shaped twisted-toroid propellers look like a revolutionary (sorry) advance for the aviation and marine sectors. Radically quieter than traditional propellers in both air and water, they're also showing some huge efficiency gains.

Snøhetta recently completed an attractive timber maritime center in Denmark. Inspired by wooden boat construction, it's designed to withstand punishing local conditions and lights up pleasantly at night, resulting in its name: the Lantern.

The new Navier 30 adds a little length over the concept that preceded it while offering the same robust range and high-tech design. It has an autopilot system meant to evolve into full autonomy and an active foil system to breeze over 4-foot waves.

Scientists from King Abdullah University of Science and Technology studying tiger sharks have leveraged their far-roaming tendencies to map out the largest seagrass system in the world, by using cameras attached to their backs.

Normally, Sweden building its first new class of submarines in 30 years wouldn't be of as much interest, but Saab laying the keel of its first Blekinge-class boat as Sweden waits to join NATO signals a shift in the balance of power in the Baltic Sea.

Drift Energy puts a different spin on wind power. Instead of creating windmill-derived electricity, its plan sees AI-routed hydrofoil sailing yachts generating electricity for electrolysis. Those yachts would then deliver green hydrogen ashore.

Japan's solar potential isn't great, but it does sit right next to one of the world's most powerful ocean currents – so the country is searching for novel ways to bulk up its green energy generation in the form of giant deep ocean turbines.

SpearUAV has released its Ninox 103 UW Sub-to-Air encapsulated autonomous quadcopter, which it says is the first loitering drone that can be launched from a submarine and other submerged platforms.

The wreck of one of the most famous exploration ships in history has been located. Using a robotic submersible, the Falklands Maritime Heritage Trust has found Sir Ernest Shackleton's Endurance, which was crushed in the Antarctic pack ice in 1915.

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.

Candela aims to smash electric boat range records with its C-8, using a hydrofoil system that eliminates as much as 80 percent of the drag you'd get from a conventional design. The first prototype C-8 has now flown, and Candela has released video.

How do whales gulp down huge amounts of water and krill without drowning themselves with every mouthful? Researchers have now discovered an “oral plug” in the throats of some species that blocks either their airways or esophagus as needed.