English: The picture shows merchant seamen receiving instruction in the art of anti-aircraft gunnery through the services of a mobile DEMS (Defensively Equipped Merchant Ships) course. In this image, the seamen are being trained to track and ‘lead’ an approaching enemy aircraft through the gun sight of a close range anti-aircraft weapon. The 'target' is a small model aircraft suspended from the side of the converted double-decker bus. The port is Immingham, East Yorkshire, now North East Lincolnshire[1]
This photograph is featured in Arctic Convoys, a new photographic exhibition looking at the experiences of those who served on the Arctic Convoys. It's on at the National Maritime Museum until 4 November 2012, www.nmm.ac.uk/convoys
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