The Last Fathom Author:Martin Caidin 4 Miles Down! They were deep beneath the waves, more than 27,000 feet, the farthest reaches of hydrospace. Orca was at home here, operated by just two men and a billion-dollar computer... the world's fastest and most powerful submarine. When it came to undersea exploration or warfare, the Orca was incomparable, invincible. Every mission, every t... more »est run, was a technological breakthrough. Underwater speeds of 100 knots an hour were clocked. Dives beyond four miles to the deepest ocean troughs were now commonplace. And then came the day that a big chunk of our planet and one of its oceans nearly became ground zero in the biggest war game of all time....« less