Night fighter
Night fighter operations did not feature in war games during 1935 and 1936. Little of the Service Regulation No. 16 concerned night fighting save for Section 253, which called for night fighting zones to be established for night fighters and anti-aircraft artillery to avoid each other. Search lights were to be used in support of the pilots. Section 253 concluded that any hindrance to offensive air forces caused by "restrictive measures" was to be avoided. The prevailing attitude to night fighting left commanders to carry out research on their own; the first occurred in Berlin, by II from May to November 1936. ordered experiments with searchlights and aircraft from the summer of 1937. In 1939 several night fighter (squadrons or flights) had been established; all of the had been converted back to day fighter units by 16 August 1939.