The UK's National Oceanography Center in Southampton is prepping to launch a new autonomous underwater vehicle (also known as a robo-sub, landlubber) capable of exploring undersea volcanoes in the Cayman Trough up to 20,000 feet deep. It'll only run for about a kilometer at a time though, so while it does have quickly replaceable lithium polymer battery packs, it still won't exactly be roaming the briny deep for months on end without human supervision. And you know how we feel about unsupervised self-directing machines.

If a wave of déjà vu just hit you like a ton of bricks, fret not, as this most certainly isn't the first (or second) time we've heard of researchers looking to the seas to create more intelligent / nimble submersibles. Apparently, a few more folks have gotten involved, as gurus from Drexel, MIT, Harvard and George Washington are now collaborating to develop a "fish-like fin to make autonomous underwater vehicles (AUVs) more agile." Apparently, the current iteration has improved on prior versions by eliminating drag during part of the "cut and sweep" motion. The general idea is to combine several of the fins in order to "allow robotic submarines to hover and turn on a dime as natural swimmers can," but it'll still be quite some time before devices such as this one can overcome ocean currents and ill-willed sea creatures.

While we've already witnessed robotic submersibles take on fish-like sensing abilities, a team at MIT is hoping to equip autonomous underwater vehicles (AUVs) with a mechanical fin in order to nix the necessity of a propeller. In essence, the crew is looking to "create a more maneuverable, propeller-less underwater robot better suited for military tasks such as sweeping mines and inspecting harbors," and they are taking a note from the bluegill sunfish to make it happen. This particular creature sports a "distinctive swimming motion which results in a constant forward thrust with no backward drag," making it the ideal candidate to replicate. Current prototypes are being constructed with a "thin, flexible material that conducts electricity," and while we've no idea when the gurus plan on cranking out a finalized version, they've already got plans to study other aspects of the sunfish's movement in order to better design the bots.

[Via Physorg]

After the recent streak of robotic failures that we've seen, it's refreshing to see yet another success story come our way. Just as it did in February, the two-meter wide DepthX (Deep Phreatic Thermal Explorer) robotic submarine successfully mapped out a massive sinkhole in Mexico, but this time was quite a bit more rewarding. The cavern that it ventured into was the El Zacatón Cenote, which is better known as the world's deepest water-filled sinkhole, and the machine was able to delve some 270-meters down to "create the first map of the giant cavity." The hole itself is large enough to "swallow New York's Chrysler Building," and while the endeavor was indeed a success, researchers are hoping to get it back down there in the near future to better analyze a mysterious slope that it wasn't quite able to probe. Godspeed, DepthX.

[Via Slashdot]

Controlling your fish remotely is one thing, but utilizing fish sense to dictate the actions of an uncrewed submersible is an entirely different animal. Malcolm MacIver and colleagues at Northwestern University have created an "artificial electric-field sensing system that could ultimately give robotic subs the same additional sensory capabilities" as found in weakly electric fish. These particular sea-dwellers have an uncanny ability to sense electric fields, and can also generate their own to "help navigate, identify objects, and even communicate with other fish." The newfangled "electro-location" system could allow underwater bots big and small to more accurately maneuver and collect data, particularly in situations where precise movements and recognition of surroundings is important. Even the creators admit that it'll be quite some time before man made sensors can come close to mimicking those found in nature, but judging by the videos seen in the read link, they're certainly riding the right wave.

[Via NewScientistTech]

The University of Washington's Deepglider won't go down as the first manmade projectile to scour the ocean for random (albeit useful) tidbits of information, but it does sport an ultra-modern frame and energy source that certainly sets it apart. Similar to the nuke detector, Edinburgh Duck, and the bevy of other submarines used for the benefit of mankind, this concoction is used to capture underwater data to aid researchers in discovering more about global warming and seafloor conditions, but its autonomous nature and carbon fiber enclosure gives it the ability to remain underwater "for up to a year" and sink to depths of nearly 9,000 feet. The 71-inch long, 138-pound device carries sensors to measure "oceanic conditions including salinity and temperature," and when not patrolling the seas based on satellite-driven controls, it can transmit the data remotely using the same signal path in reverse. Notably, the torpedo-like device boasts an energy-efficient, battery-powered design that allows it to stay submerged for ridiculous amounts of time without needing a recharge, and while we're not too sure if its researchers are too caught up in its unmatched diving abilities to notice how swank the power system is, they've apparently got a good thing going.

As Popular Science reports, inventor/spelunker Bill Stone's DepthX robot submarine recently underwent its first successful test in Mexico's La Pilita underwater cave, which Stone hopes is only the first step on the bot's way to exploring Jupiter's ice-covered moon, Europa. After a slight delay with some suspicious border guards, the robot quickly got to work on its initial field test, diving some 300 feet down into the cave system, collecting samples, capturing images, and building a 3D map of the area. As the video after the break shows, the robot is definitely built to impress, with some decidedly sci-fi sounding sound effects adding the perfect final touch. According to Popular Science, DepthX will undergo another field test next month, to be followed by a considerably bigger challenge in May, when it'll dive more than 1,000 feet into the Zacaton, the world's deepest sinkhole.

[Via Slash Gear]

With all the great underwater nature documentaries available in high definition these days, we have no real interest in actually getting out of our chairs to go exploring among sharks, fish, and seaweed, but it's nice to know that there will soon be a non-self-powered personal submarine on the market in case we ever do decide to take the plunge. After three years of furious design, development, and testing, a Dutch company called U-Boat Worx is finally ready to release its battery-powered C-Quester 1 to aquatic enthusiasts worldwide, which will allow them to cruise down to depths of 50 meters at a maximum speed of 3 knots for up to two-and-a-half hours. The main advantage of this craft over traditional scuba diving is the fact that its cabin maintains a constant pressure of one atmosphere, meaning that you can surface immediately without having to sit through those boring decompression periods -- and if for some reason you can't surface, the on-board oxygen tanks and CO2 scrubbers will keep you alive for 36 hours or until help arrives, whichever comes first. Scheduled to ship sometime this month, the CQ1 is conspicuously missing a pricetag on the company's website; you have to call or write if you're interested, which probably means that pricing falls somewhere between a Sea-doo and a 7-series BMW.

[Thanks, Sytse S.]