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Beyond coastal defence: A comprehensive look at the general characteristics and service history of the U.S. S-Class submarines

Introduced between 1920 and 1925, the S-class submarines from the United States signalled a move towards open-ocean operations. They participated in both World Wars I and II as 51 units. With a maximum speed of 15 knots, a powerful armament, and a range of 219 to 240 feet, these submarines were an invaluable asset to training and combat missions.