Entering service in early 1941, the Dornier Do 217 was designed as an improved version of the Flying Pencil, the Do 17 bomber. Then, on 25 August 1943 twelve Do 217E-5s from II. /KG 100 attacked a convoy off the Spanish coast with a similar weapon to the Fritz X, the Henschel Hs 293 radio-guided glide bomb.
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