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Sea Hunter: The US Deadliest Submarine Killer.

The U.S. Navy is fast-tracking several large submarine-hunting Sea Hunter drones intended to search, find and even destroy enemy undersea boats, conduct surface warfare missions, fire weapons and launch electronic attacks.
The Defense Advanced Research Project Agency’s “Sea Hunter” began in 2010 as an anti-submarine ship called “Anti-Submarine Warfare Continuous Trail Unmanned Vessel,” or ACTUV. Following its progress over the course of several years, the program transitioned to Navy leadership.
The ship is built to travel up to 10,000 miles while using sonar and other sensors to locate mines and even the quietest enemy submarines. The Sea Hunter’s high-frequency sonar can send acoustic “pings” into the ocean before analyzing the return signal to determine the shape, size, speed and characteristics of any undersea enemy activity.