Word: pinpoint
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Dates: during 1960-1969
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...ship must know its exact location. The complicated celestial-periscope system has 80,000 components and must be kept working to perfection. The periscope runs a constant double check on the Cadillac-sized SINS (ship's inertial navigation system), which tracks the sub's underwater course with pinpoint accuracy. The missiles are housed gently in their tubes in the compartment that the submen call "Sherwood Forest." They must be wet-nursed hour by hour, their computers prepared to receive fire-control data, their gyros kept warmed and ready, their switches checked and rechecked so that they...
...degree of artery disease, but those who finally learn of their illness usually do so the hard way-with a heart attack or a stroke. And because doctors have been unable to look into the body and watch the small coronary arteries work, they have also been unable to pinpoint blockages and accurately determine the extent of artery disease...
Guiding itself by the changing style Greek pottery fragments, the expedition was able to pinpoint discoveries in time sequence that spans 2,700 years the city's history, from...
...system promises to pinpoint the Pleistocene. Developed at the University of Miami by Dr. John Rosholt of the U.S. Geological Survey and Italian-born Dr. Cesare Emiliani, it depends on the fact that a tiny amount of uranium is dissolved in all sea water. When it slowly decays radioactively, it yields protoactinium 231 and thorium 230, both of which attach themselves to sediment particles and sink slowly to the bottom. There they in turn decay, but protoactinium 231 decays faster than thorium 230. The age of sediment on the ocean floor can therefore be determined by measuring the relative abundance...
...more important. Solid-fuel missiles, built so that they will float nose-up, might be anchored under the surface in protected places such as the lagoons of Pacific atolls. They would be easily moved, hard for an enemy to find, and almost impossible to damage except by the near-pinpoint hit of a nuclear weapon. Their guidance systems would know exactly where they were, so they could be programed to strike in any desired direction. If an all-out war started, the high-flying minefields should be able to rise from the sea, triggered by electrical or sonic code signals...