Word: sonar
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Thach and his men, and the civilian scientists working on ASW problems, hunt this jungle with sonar and radar equipment that has grown in sophistication over the years but is still far from perfect. Heavy seas, hammering the hull of a destroyer, can override the sonar-transmitted sounds of distant submarine screws or reduction gears. The sun heats the thin layer of air over smooth water, and this in turn can bend radar waves. Sometimes a thermal layer, 100 to 300 feet deep, distorts sound-and a knowledgeable sub skipper plays this layer like a shield. He can confound enemy...
...Trieste help? It may improve sonar gear by showing how to cut through the ocean's sound-distorting layers of temperature and noisy marine life. Already it has found life right at the bottom. Another finding: layers of different temperature form "tunnels" that carry sound waves for thousands of miles. In one, an exploding 4-lb. charge of dynamite can be heard from San Diego to Hawaii...
Last week Raytheon won a $6,000,000 contract for the electronic controls of the Navy's new surface-to-air Tartar missile, announced a $6,000,000 contract for development of a radically new sonar system for atomic submarines. To manufacture top-secret communications equipment for the Air Force, the firm is shopping around for a huge new factory that will add one-sixth more capacity to its plants, which are scattered from Massachusetts to California...
...After the attacks," said Frondizi, "there were oil slicks on the surface of the sea as when a submarine is damaged." Sonar gear aboard the Argentine ships established that the unidentified sub was a "high-speed" modern craft, i.e., U.S., British or Russian...
...fleet - apparently make a point of staying outside the three-mile limit, thus exert their legal right to watch such U.S. coastal phenomena as missile tests at Cape Canaveral, thus present the U.S. Navy a legal opportunity to test antisubmarine hunter-killer techniques of sonar, radar, camera and what Navymen call "the Mark I eyeball" on real, live Red Star targets. Extent of U.S. submarine activity off Russia's shores: not known but presumably reciprocal...