Word: sonar
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...destroyer, but its 7,000-ton displacement is more than three times that of a World War II Fletcher-class destroyer. One deck below the bridge on this modern ship, inside the dimly lit combat information center, highly trained specialists bend over computer consoles that monitor the sonar and radar and control the guns, torpedoes and antisubmarine weapons. The 5-in. cannons fore and aft are fired by two men sitting at a console rather than by eleven World War II sailors scrambling with cradles...
Polaroid's sonar focus will help in its bruising marketing fight with Eastman Kodak, which also held its annual meeting last week. Though Kodak offered no new products, it had good news: earnings for the first quarter rose a record 50% from the depressed period of a year ago, to $141 million...
Land has no present plans to sell or license sonar focusing to competitors. Potentially, it has uses that go well beyond photography. For example, the small unit might be employed as an obstacle locator for the visually impaired and those who work in the dark, or as an underwater ranging device for divers...
...Pacific Ocean north of Hawaii, where they are snatched from the air by a giant Y-shaped sky hook bolted to the nose of an Air Force cargo plane. If that fails, the cannisters float on or just under the surface of the Pacific, giving off radio and sonar signals, and are recovered by frogmen...
...microwaves" are very intense concentrations, "short-waves" of electromagnetic radiation focused into an intense beam. They travel through matter, can be reflected by electrical conductors, and can be directed accurately. Thus, microwaves revolutionized communication. They are responsible for television communications, radio (especially FM) broadcasts, CB radio, satellite communication, radar, sonar, and electric garage-door openers...