This once-secret film details the discoveries and technology of the new era of “Smart Bombs”. The Fritz-X was steered by an operator in the launching aircraft. The steering signals were communicated over a radio link between the aircraft’s Kehl transmitter and the weapon’s Straßburg receiver. The crewman who guided the bomb had to be able to see the target at all times, and the bomb had a flare in the tail so it could be seen from the controlling aircraft. The disadvantage with this — in comparison to self contained glide bombs like the slightly later VB-6 Felix — were that the aircraft had to be flown toward the target on a steady course and that as the missile neared its target it became possible to misguide by jamming its radio channel.