The Manta Ray program, launched in 2020 ... including the Sergei Kotov patrol ship and the Ivanovets corvette. Ukraine has also used sea drones to attack key infrastructure like the Kerch Bridge ...

Northrop Grumman has designed a new unmanned drone for the US military that acts like a stealthy manta ray underwater ... US Ally Meets China's 'Monster Ship' Guarding Artificial Islands I ...

Manta Ray is an extra-large glider UUV ... of-the-art facilities to lead the development and support of Navy surface ship warfare systems throughout their life cycles.” ...