Ghost Of The Sea

Is this the U.S. Nay’s follow on to the $195 million Sea Shadow program, the Sea Shadow that’s currently floating on the scrap heap, waiting to be dismantled?

New Stealth Boat Glides Over Gas Layer

A new kind of boat is designed to move quickly and stealthily through water by generating a layer of gas around its underwater surfaces.

The design reduces friction by a factor of 900, according to the New Hampshire company that produced the boat. Its smooth speed makes it ideal for special operations. It could also revolutionize shipping.

Juliet Marine recently unveiled the Ghost, a ship it says can reach speeds of up to 60 miles per hour. The shape of the craft is similar to earlier attempts at making watercraft less visible to radar — notably the Navy’s “Sea Shadow” project of the 1980s.

The phenomenon is called supercavitation. Supercavitation occurs when a projectile moving through water generates a low-pressure zone around its surface. Go fast enough and the low-pressure zone becomes a layer of gas. In that respect the Ghost is similar to a Russian-made torpedo (called the “Shkval,” or squall), though the underwater portion of the boat’s twin hulls are a new design.

See also:
Juliet Marine Systems, Inc. Announces the First Super-Cavitating Ship, GHOST
Stealth Boat Glides Over Gas Layer
‘Ghost’ craft comes into view
Ghost ship unveiled: Stealth vessel is ‘virtually unstoppable
GHOST Boats Will Prey on Pirates
Pirate-fighter vessel revealed by Juliet Marine
Juliet Marine Develops Offshore Anti-Piracy Platform
“Stealth” Boat Could Revolutionize Naval Warfare
Juliet Marine Systems

Given the massive debt hole the U.S. is already in and that the Sea Shadow ended up being scrapped, I’m not sure the Navy really needs a new “stealth boat” like the Ghost, especially if it’s primary purpose would be to combat pirates. Pirates, for the most part, don’t have radar. The problem isn’t sneaking up on them, the problem is finding them in the first place and we don’t need a “stealth boat” for that.

/the supercavitation technology does, however, appear to be extremely promising in terms of possible commercial shipping applications where time and fuel are money

Fun With Electromagnetic Energy

The Navy thinks they’re going to put this on the deck of a ship? Damn thing looks like it would cause rolling brownouts in Los Angeles.

Navy Sets World Record With Incredible, Sci-Fi Weapon

An electromagnetic railgun offers a velocity previously unattainable in a conventional weapon, speeds that are incredibly powerful on their own. In fact, since the projectile doesn’t have any explosives itself, it relies upon that kinetic energy to do damage. And at 11 a.m. today, the Navy produced a 33-megajoule firing — more than three times the previous record set by the Navy in 2008.

“It bursts radially, but it’s hard to quantify,” said Roger Ellis, electromagnetic railgun program manager with the Office of Naval Research. To convey a sense of just how much damage, Ellis told FoxNews.com that the big guns on the deck of a warship are measured by their muzzle energy in megajoules. A single megajoule is roughly equivalent to a 1-ton car traveling at 100 mph. Multiple that by 33 and you get a picture of what would happen when such a weapon hits a target.

See also:
Railgun, futuristic weapon, tested by Navy
Railgun shot heard round the world
U.S. Navy Railgun breaks speed records
Futuristic Railgun Weapon Sets US Navy Record [VIDEO]
Railgun shots break record
Railgun moves closer to real use
Navy’s Mach 7 gun can kill from 100 miles away
Navy test fires electromagnetic cannon
Navy: Dahlgren Railgun test is successful
Navy railgun: weapon from hell or game changer? – photo gallery and video
Electromagnetic Railgun Program – Office of Naval Research
Railgun

To make this technology even remotely practical for use at sea, the Navy’s going to have to make the railgun a lot smaller and more energy efficient.

/oh, and they’re going to have to figure out a way to keep the gun rails from melting every time they fire it