Secretive Thunderbirds-style underwater drone is gearing up for action
The Manta Ray prototype in the waters off Southern California (Picture: Northrop Grumman/SWNS)An underwater military drone has completed testing at sea, and could soon be ready to be deployed – although it has not been revealed where or what for.The Manta Ray prototype uncrewed underwater vehicle (UUV) is designed for long-duration undersea missions and includes ‘several payload bays of multiple sizes and types to enable a wide variety of naval mission sets’, offering little in