Juliet Marine’s “Ghost” Ship

GHOST ship (image: Juliet Marine Systems)—Supercavitating ship from Portsmouth, NH-based Juliet Marine Systems

Juliet Marine’s “Ghost” Ship Emerges from Stealth Startup, Gears Up for War -- Xconomy

About an hour north of Boston, in a city by the sea, there’s a project underway to reinvent the marine industry. More specifically, the marine defense industry.

Imagine a boat that moves through the water differently from any other boat in existence. It uses “supercavitation”—the creation of a gaseous bubble layer around the hull to reduce friction underwater—to reach very high speeds at relatively low fuel cost. Its speed and shape means it can evade detection by sonar or ship radar. It can outrun torpedoes. Its fuel efficiency means it has greater range and can run longer missions than conventional boats and helicopters.

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My Comment: A fascinating story .... read it all.

Sweden Deploys The First 'Operational' Stealth Warships

Image from Wired

From Wired:

The country that gave us Volvos, Saabs and ABBA has developed what it claims is the world's first fully operational stealth warship that is essentially invisible to radar.

The two Visby-class corvettes will enter service by the end of the year. They are made from composite materials and use Rolls-Royce water jets to make them electronically undetectable at more than eight miles in rough seas and more than 14 in calm waters. The ship's acoustic and optical signatures are lowered by its non-magnetic hull that, like the F-117 Nighthawk, features large, flat surfaces and sharp angles. The water jets are 10 to 15 decibels quieter than propellers.

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