Night fighter units
From the spring of 1939 the new code letter system for Kampfverbänden was introduced. The combination of numbers and letters in front of the side cross indicated the appropriate unit to which a particular machine belonged.
The first raid of 99 RAF aircraft on the Ruhr took place on the night of May 16, 1940, and after the end of the "Battle of Britain", Germany became a very frequent target of night raids by British bombers. Initially completely unprepared, the Luftwaffe could only offer its fighters black aircraft paint and flame arresters for engine exhausts. It was not until September 1940 that AEG's "Spanner" infrared detectors began to be mounted on the bows of Bf 110 C and D fighters. They were able to capture the thermal radiation of the exhausts of the bomber engines at a distance of about 300 m and display them on a small screen in front of the pilot - the so-called "Q-Rohr" ...