This is an authentic collection of introductory notes produced by the British Air Ministry and issued to RAF aircrew at the start of their careers. These notes cover the theory and principles of bombing and air gunnery. They were current in 1944 and, with permission of the Ministry of Defence, are reproduced in the format in which they were issued. The notes give a fascinating insight into the principles and theory of aerial bombing and gunnery as taught to RAF Bomber Command aircrew in the Second World War. They include many technical details of equipment and ammunition in use at that time and provide much useful information for researchers, historians and others with an interest in the subject.