[1] On 11 November 1941, Zweigart made a forced landing at Sablin, near Lyuban, following combat damage sustained to his Messerschmitt Bf 109 F-2 (Werknummer 12943—factory number).

[2] On 27 July 1943, Zweigart was shot down in his Bf 109 G-6 (Werknummer 15678) by Supermarine Spitfire fighters, bailing out near Norden.

[3] On 8 June 1944, Zweigart was shot down flying Focke-Wulf Fw 190 A-8 (Werknummer 170736) in aerial combat near Les Champeaux, France.

[9] Spick also lists him with 69 aerial victories claimed in an unknown number of combat missions.

The Luftwaffe grid map (Jägermeldenetz) covered all of Europe, western Russia and North Africa and was composed of rectangles measuring 15 minutes of latitude by 30 minutes of longitude, an area of about 360 square miles (930 km2).