The Navy is testing a stealthy, 4 foot-long fish-shaped autonomous underwater vehicle designed to blend in with undersea life and perform combat sensor functions, service officials explained.
The so-called “bio-memetic” undersea vehicle is currently being developed as part of the Chief of Naval Operations Rapid Innovation Cell, or CRIC – a special unit set up by CNO Adm. Jonathan Greenert in 2012 to explore the feasibility of rapidly turning around commercially available technologies for Naval military use.
“It mimics a fish. It looks like a fish. We call it robo-tuna, affectionately, but it is a UUV (unmanned undersea vehicle). It does not have a propeller or a jet. It actually swims by flipping its tail around,” said Capt. Jim Loper, concepts and innovation department head, Navy Warfare Development Command, Norfolk.
The robot-fish is highly maneuverable and can accelerate quickly, reaching speeds up to 40 knots, Loper said. Being propelled by its tail instead of a shaft or propeller helps it remain stealthy and energy efficient. The shark-like sensor is engineered to carry a range of payloads from acoustic sensors to underwater cameras, he explained.
Built in Massachusetts by a firm called Boston Engineering, the robot fish could be used for a range of missions including undersea mine detection or prolonged surveillance of ships, ports and submarines.
“We’re imaging this can loiter for days, possibly weeks on a battery that allows it to maintain its position. This is a sensor we can put out there that matches in with the local life so to speak,” Loper added.
The UUV is currently configured with a lithium ion battery and is engineered so that its front end remains stationary in order to maximize sensor performance.
“The fact that the front portion of the animal is mainly stationary when swimming is important because when you carrying sensors, you don’t want everything moving all over the place and messing up what you are carrying on board,” Mark Smithers, vice president and chief technology officer at Boston Engineering, said in a written statement.
Another test of the robot-fish is slated for this coming December, said John Hottendorf, CRIC program manager.
“This is an empty truck. You can put whatever kind of sensor you want on it,” Hottendorf said.
Should development continue as expected, the robot-fish could wind up being ready for deployment and operational use within the next several years, Hottendorf explained.
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