The range could be even more than 35,000 yards, especially at high altitude, with head-on supersonic targets. One of the longest shots recorded was made by HMS "Antrim" against a target over away, with an impact at 34.500 with about 46 seconds flight time. The missile was capable to reach potentially aven higher altitude and longer range than nominally assested: even after the engine flameout (over 40 seconds after launch), it retained very high speeds, and one of them even surpassed before being self-destructed, about one minute after the firing