Re: [PSUBS-MAILIST] Re: Endurance record sub drone.'n torpedo sub inquiry

["dino snider" <dinosnider666@hotmail.com>]

plus see underwatertimes.com for article on new navy seal sub.
does anybody know where to find more info on the article's torpedo subs? 
Thanks.

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Marathon bot: Most drones run on gas or diesel fuel. Once their tanks are 
empty, the robots have to come home to be replenished. But ONR's Seaglider 
drone is different: It doesn't burn fuel at all. The pink, dolphin-shaped, 
110-pound robot is propelled by changes in buoyancy. That's why the 
Seaglider recently set the record for the longest robotic stint at sea -- 5 
months and 1,677 miles.

By inflating a sack the size of a few shot glasses, the Seaglider alters its 
volume ever so slightly, causing it to dive or rise to the surface. That 
up-and-down motion is then turned into horizontal actions by the glider's 
wings. Shifts in the drone's battery pack cause it to turn.

Eleven of the drones have been built so far, with another 11 about to be 
shipped from the factory, said Neil Bogue, an ONR-funded research scientist 
at the University of Washington's school of oceanography.

They have been used mostly for underwater climate studies. The Seagliders' 
sensors can pick up changes in ocean salinity, chlorophyll concentration and 
dissolved oxygen. But in the future, the drones could be converted to 
more-martial purposes. The Seaglider might become an early warning force for 
mine hunters -- one that never has to stop to refuel.

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