China’s unmanned submersibles now rank as the world’s largest, with last year’s military parade showcasing two models (HSU001 and AJX002) approaching 20 metres (66 feet) in length. Satellite imagery analysed by Western media also revealed a classified variant exceeding 40 metres at a naval installation, triggering international concern – particularly in the United States. These dimensions created a brand new class of drones known as extra-extra-large uncrewed underwater vehicles (XXLUUVs). They dwarf America’s largest unmanned underwater vehicle, the 15-metre “Orca”.

Full report : Huge size of China’s unmanned submersibles has US defence experts worried Beijing may attack vulnerable targets including LA and Seattle.