Discover our Royal Navy D Class Submarines photo prints, featuring the boats that turned the submarine from a harbour defence craft into a true sea-going warship. The eight boats, built between 1907 and 1912, were the first British submarines with diesel engines in place of petrol, the first with twin screws and the first fitted with wireless, and D4 was the first to carry a deck gun. They patrolled the Heligoland Bight from the opening days of the First World War, and four were lost before the Armistice, D3 being sunk in error by a French airship in 1918. Available as high-quality photo prints or premium framed prints, they are perfect for collectors and enthusiasts of Royal Navy history. Browse the collection to find the ideal print for your home or office.