132ft-long self-driving 'Sea Hunter' has joined US Navy

The US Navy is set to roll out a self-driving drone warship that can hunt down enemy submarines. Dubbed the'Sea Hunter', the 132ft (40-metre) ship is designed to travel thousands of miles out at sea without a single crew member on board. Now a prototype of this submarine-stalking autonomous ship that could scour the open seas for months at a time has been officially transferred to the US Navy. The vessel is currently a surveillance platform and has no weapons on board. It can reach speed of 27 knots and uses cameras and radar to track its location and spot other ships.