LESSONS IN AIMING FOR MACHINE GUNNERS (GROUND DEFENCE) [Main Title]
Instructional film for machine gunners, composed mainly of diagrams with a voice over commentary, with twelve short introductory points explained
(1) The ring and aperture sight. (2) Simpler aspects of gunnery. (3) What to do in the case of attacking aircraft. (4) How to make a fixed setting giving an approximate allowance for bullet drops. (5) Harmonisation and correct adjustment of gunsights. (6) The importance of recognising the size of aircraft from a distance, using diagrams of Junkers Ju 88. (7) Allowing for deflection and how to calculate an average allowance. (8) How to recognise the small line of flight of less than 20 degrees. (9) Point blank shots. (10) Additional gun positions. (11) Defence against airborne troops. (12) Alternative position of foresight.
The 'Blitz' – from the German term Blitzkrieg ('lightning war') – was the sustained campaign of aerial bombing attacks on British towns and cities carried out by the Luftwaffe (German Air Force) from September 1940 until May 1941.