testfire was aimed at the final verification of overall technical specifications of the developed hypersonic weapon system kcna reported after its release from the rocket booster a hypersonic glide vehicle made a 600 km 375 mile glide jump flight and then 240 km of corkscrew manoeuvering before hitting a target in the sea 1000 km away the report said south korean officials had questioned the capabilities of the missile after the first test last week saying it did not appear to demonstrate the range and manoeuverability claimed in a state media report and featured a manoeuverable warhead rather than an actual glide vehicle on tuesday however south korea said the second test appeared to show improved performance with the missile reaching top speeds up to 10 times the speed of sound 12348 km per hour 7673 miles per hour although they did not comment on its manoeuverability the superior manoeuverability of the hypersonic glide vehicle was more strikingly verified through the final testfire kcna said