Summer, 1917: Britain is losing the war against the deadly German U-boats.
After close fought action, Commander David
...Discover the inner workings of 15 watercraft, from racing catamarans to deep-sea submersible. Each illustration explains the technology behind central components & throughout there are photographs to show each craft in action. Ideal for: Teaching children the inner workings of ships & submarines. This paperback has 40 pages & measures 29.5cm x 22.5cm x 0.5cm