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.

Stealth Weapons From Around The World

Photo: Department of Defense/Flickr

Now You See ‘Em, Now You Don’t: Stealth Weapons From Around The World -- The Danger Room

Not long ago, the U.S. was the only country in the world with aircraft that could stroll the skies without fear of being caught. Not any more. Today, militaries from around the world — including Russia and China — are developing their own stealth arsenals. The American monopoly on near-invisible flight is being eroded.

Stealth technology makes vehicles sneakier by limiting the signatures that give them away to enemy radar, sensors and ears. To reduce a plane's radar cross section, designers have two basic options: shape an aircraft to cast incoming radar away from its originating source and coat it to absorb radar waves.

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