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HMS Iron Duke firing a Harpoon missile
A harpoon is launched during a live firing exercise

Sub Harpoon Breaking the SurfaceA Sub Harpoon, launched from a submarine, Breaks the Surface Fitted to the batch III type 22 Frigates and the type 23 Frigates, the Boeing (McDonnell Douglas) Harpoon is a sophisticated anti-ship missile using a combination of inertial guidance and active radar homing to attack targets out to a range of 130km. Cruising at Mach 0.9 and carrying a 227kg warhead it is powered by a lightweight turbojet, but is accelerated at launch by a booster rocket. A submarine launched version, known as Sub Harpoon, is also in service aboard the Swiftsure and Trafalgar class SSNs.