Meet Sea Hunter the self-driving warship: US Navy officially names its 132ft-long drone boat that scours seas for enemy subs

The US has officially christened its experimental self-driving warship designed to hunt for enemy submarines for months at a time. The 132ft-long (40-metre) unarmed prototype, dubbed Sea Hunter, is the naval equivalent of Google's self-driving car, designed to cruise on the ocean's surface without a crew. The ship's projected 20 million ( 14.2 million) price tag and its 15,000 ( 10,650) to 20,000 ( 14,300) daily operating cost make it relatively inexpensive for the navy. The 132ft-long (40-metre) unarmed prototype, dubbed Sea Hunter, is the naval equivalent of Google's self-driving car, designed to cruise on the ocean's surface without a crew. The ship's projected 20 million ( 14.2 million) price tag and its 20,000 ( 14,300) daily operating cost make it relatively inexpensive for the navy The vessel was unveiled by Deputy US Defense Secretary Robert Work and has been developed by the Pentagon's Defense Advanced Research Projects Agency (Darpa).