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Marine

— Marine

Wärtsilä's new 31 becomes the most efficient 4-stroke diesel engine in the world

By - June 22, 2015 4 Pictures

Finnish engine manufacturer Wärtsilä must be a fascinating place to visit. The company manufactures some of the most mind-bendingly enormous marine diesel engines in the world, like the record-breaking, 89-foot high, 44-foot long, 110,000 horsepower RTA96-C we wrote about more than 10 years ago. Now, Wärtsilä has another entry in the Guinness Book of Records ... for the world's most efficient 4-stroke diesel engine.

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— Marine

Seawolf sub takes your GoPro on an undersea voyage

By - June 15, 2015 2 Pictures

While there are plenty of aerial drones that show us our surroundings from up in the air, there are far fewer remote-control devices that let us see what's lurking beneath the surface of the water. Although the Aquabotix Hydroview is one, at around US$3,000 it certainly isn't cheap. While still not inexpensive, the newest version of the TTRobotix Seawolf is considerably less pricey – partly because it incorporates the user's existing GoPro actioncam.

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— Marine

Experimental Jet Blade personal watercraft features tilting front suspension

By - May 15, 2015 33 Pictures

A team from Calvin College, Michigan, is trying to put the "ski" back in "jet ski" with a unique kind of personal watercraft (PWC) that features three skis, a tilting front suspension system and a 650cc engine. Inspired by the dual-ski Wetbike of the 1970s and 80s, and perhaps a little by the bizarre Watercross racing movement, the Jet Blade team has completed prototyping and preliminary water testing.

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— Marine

Submersible photographs WW2 Japanese sub's long-lost airplane hangar

By - April 29, 2015 6 Pictures
Until the 1960s, Japan's three I-400-class subs were the largest submarines ever built. They were so large, in fact, that they could each carry and launch three Aichi M6A Seiran amphibious aircraft. The idea was that the submarines could stealthily bring the planes to within striking distance of US coastal cities, where they could then take off and conduct bombing runs. Now, for the first time since it was scuttled at the end of World War II, one of the sunken subs' aircraft hangars has been photographed. Read More
— Marine

SipaBoard stand-up paddleboard uses a motor for extra speed – and to inflate itself

By - April 20, 2015 4 Pictures
While stand-up paddleboards are usually a lot of fun to use, they can be a hassle to transport and store. That's why we've seen ones that can be folded up and disassembled. The SipaBoard, however, takes yet another approach – it's inflatable. An onboard electric motor pumps the air into it for you, plus it also powers an integrated jet drive that provides paddlers with a boost. Read More
— Marine

The 3 boats-in-1 Van Diemen Sports Limousine super yacht tender

By - April 15, 2015 23 Pictures
The all-new Sports Limousine from Tasmania's Van Diemen Luxury Crafts joins the swelling legion of convertible, multi-use boats that includes the sports coupe-styled Revolver 44 GT and the Kormoran super-transformer. The Sports Limousine goes a step beyond the basic electric hard-top convertible, adding an electrically raised glasshouse to create three distinct body styles for a myriad of on-water uses. It's a cozy fishing boat, a roomy, semi-enclosed limousine, and a compact tender in one. Read More
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