English: Photo demonstrating the observer's firing positions in the Royal Aircraft Factory F.E.2d . The observer's cockpit was fitted with three guns, one fixed forward-firing for the pilot to aim, one moveable forward-firing and one moveable rear-firing mounted on a pole over the upper wing. The observer had to stand on his seat in order to use the rear-firing gun. IWM Caption: "Lieutenant W C Cambray demonstrates the precarious stance required to use the rear-facing Lewis gun fitted to Royal Aircraft Factory F.E.2d biplane of No. 20 Squadron, Royal Flying Corps at Sainte-Marie-Cappel, France. Crew: pilot Captain Stevens, observer Lieutenant W. C. Cambray. The aircraft has a message displayed on the fuselage reading: 'Presented by the Colony of Mauritius No. 13'."