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Known as Turtle, the world's first military submarine appeared during the American War of Independence. It was 10 feet long, constructed of two wooden shells covered with tar, propelled by a one-person crew using hand-cranked propellers, had enough air for a 30 minute dive and its weapons were a drill, a keg of gunpowder and a time fuse. Fast forward 230-odd years to the British Navy's Astute class submarine, which is currently undergoing sea trials, and you get a very different picture. Made up of a million individual components and capable of carrying 93 crew and an array of weapons including Tomahawk cruise missiles, the nuclear-powered Astute class is 97m long, weighs 7,800 tons, is coated in 39,000 sonar masking acoustic tiles and doesn't need refueling throughout its expected 25 year service life...
Tags: BAE Systems, Military, sonar, Submarine
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