There is a typed caption on the back which reads: "Training Air Gunners for the R.A.F. - The panoramic trainer in action. The gunner under instruction is in the enclosed gun turret with his instructor seated in the open alongside. A model enemy plane moves in front of a panorama background. The Gunner is instructed to fire a burst when the plane is at a certain distance as judged by the size of the plane in his gun sight. As soon as he presses the trigger and [sic] mechanism stops a light shows in front of instructor. The gunner is then told the amount of his error if any."