Anti-sub Drone

[tomahawk6]

http://www.popularmechanics.com/military/navy-ships/a23579/engineless-underwater-sub-chaser/

Video
https://www.youtube.com/watch?v=At4ug9C5gI4

The U.S. Navy has approved the use of buoyancy gliders by all of its destroyers. These unmanned underwater vehicles use wave energy to propel themselves at sea. The Navy probably will use them to locate enemy submarines.

Buoyancy gliders were originally developed by the scientific community to provide low-cost, autonomous drones capable of spending long periods of time at sea. The drones look like cruise missiles, with blunt noses, a vertical stabilizer tail fin, and two small winglets.

 

[Colin Parkinson]

Makes sense, you can drop one off, search another area and also use a helicopter, so you can have 3 points of active and passive searching.

 

[Ping Monkey]

http://nationalinterest.org/feature/america-may-soon-fight-itself-underwater-war-china-21650?page=show


As witnessed when China plucked a US glider out of the ocean, this is certainly one aspect of underwater domain awareness that is quickly gaining traction.