Word: subs
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...team painstakingly swept 120,000 linear miles of ocean with magnetometers, devices that detect irregularities in the earth's magnetic field--anomalies caused by, among other things, iron cannons, armor or anchors. They used side-scan and sub-bottom sonar and even commissioned an aerial survey, but the search did not yield a verifiable Atocha remnant. Says Fay Feild, an engineer and consultant to Treasure Salvors, who designed a special magnetometer for Fisher: "With a magnetometer, even in a limited area, only one in 100 'hits' has anything to do with a wreck. With a side- scanner...
...undersea vessels like Alvin and J.J. In 1963 the Navy's brand-new nuclear-powered submarine Thresher lost power and sank 220 miles east of Cape Cod with 129 on board. It took 1 1/2 years before a Navy search team, aboard the bathyscaphe Trieste II, finally located the sub resting 8,400 ft. down...
...roam the sea floor at a speed of one knot (Alvin has since been lengthened to 25 ft. and given a second arm-claw, as well as a new pressure hull that enables it to operate as far down as 13,120 ft.). The stellar performance of the tiny sub during the second Titanic mission was only the latest in a long list of accomplishments. Among the more remarkable of Alvin's 1,716 deep-sea missions: locating and helping to recover (from a depth of 2,850 ft.) an H- bomb that fell into the Mediterranean after...
...Says Hydro Products Executive Bob McKee: "You can just throw it into the back of your pickup, run out to the site and throw it into the water." Prices are also dropping for such devices as side-scan sonar, which generates high-resolution images of the ocean bottom, and sub-bottom sonar, which can distinguish the shape of buried objects...
...Ridge, Tenn., where research was under way % on atomic reactors. Rickover believed the Navy could extend its reach and free itself of the need to refuel ships if nuclear power plants could be squeezed into submarines' tiny hulls. Rickover's work eventually spawned not only the first nuclear-powered sub, the Nautilus, launched in January 1955, but the first civilian nuclear power reactor, at Shippingport, Pa. Today more than 150 of 554 U.S. naval vessels steam under nuclear power; American submarines can stay submerged for months and traverse the waters beneath the polar ice caps...