Marcel Geely uses his outstanding observation ability, control and shooting tactics with large angle deviation, which makes his attack often have a very high killing rate. In a good environment, he can injure or shoot down enemy planes in every attack, and he is one of the most outstanding deviation shooting pilots in the history of air combat. He also set a record of shooting down eight enemy planes in ten minutes, 17 enemy planes in one day and 54 enemy planes in one month. According to some scholars' calculations, he only needs 15 bullets on average to shoot down an airplane. Of the 588 fighters (I./JG 27) in the 27th fighter wing (Jagdgeschwader 27) to which Marcel belongs, Marcel accounts for 15 1 fighter, reaching 26%.
-Wikipedia