Fritz X
"Fritz X" was guided by a Kehl-Strasbourg radio control link, which sent signals to the movable spoilers in the thick vertical and horizontal tail fin surfaces, within the annular tail fin structure. This control system was also used for the unarmored, rocket-boosted Henschel Hs 293 anti-ship ordnance, itself first deployed on 25 August 1943. The "Straßburg" receiver antenna installations on the "Fritz X" were aerodynamically integrated into the trailing edge of the annular surfaces of the tail fin, non-metallically encapsulated within a quartet of "bulged" sections in the trailing edge. This design feature of the "FuG" 230 "Straßburg" receiver installation is not entirely unlike the Azon (US contemporary guided bomb), which had its own receiving antennas placed in the quartet of diagonal struts bracing the fixed sections of its tail fins.