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In page Imperial German Navy:

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The Imperial Navy was the first to operate submarines successfully on a large scale in wartime, with 375 submarines commissioned by the end of the First World War, and it also operated zeppelins. Although it was never able to match the number of ships of the Royal Navy, it had technological advantages, such as better shells[citation needed] and propellant for much of the Great War, meaning that it never lost a ship to a catastrophic magazine explosion from an above-water attack,[citation needed] although the elderly pre-dreadnought SMS Pommern sank rapidly at Jutland after a magazine explosion was caused by an underwater attack.