Word: sonare
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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...
Clifford began his search for the Whydah in 1982. Armed with an exclusive permit from the state of Massachusetts, he concentrated on a 2-sq.-mi. area, using a magnetometer and side-scan sonar. In the summer of 1983 divers found a clay pipestem, brass nails and some rudder strapping. But try as he might, Clifford could not convince everyone that the artifacts were from the Whydah and not from any of the countless other ships that have been wrecked off the Cape. Even the 1984 discovery of three cannons failed to satisfy Clifford's critics. But last fall, while...
...wreckage from the space shuttle Challenger. Designed to operate at depths as great as 5,000 ft., the 7,000-lb. ungainly craft uses hydraulic thrusters to maneuver like an underwater helicopter. It has two mechanical arms and is loaded with high-tech equipment. Its three cameras and two sonar systems give controllers on the surface a sweeping view of the depths...
...search ship using sonar about 25 miles northeast of Cape Canaveral made a possible identification of the compartment late Friday, and divers Saturday positively identified compartment debris and crew remains, the NASA statement said...
Despite the obvious devastation of the explosion, searchers began finding surprisingly large parts of the wreckage, the biggest being a 25-ft.- long section of the spacecraft's fuselage. Parts of the shuttle's wings, cabin and cargo-bay door were tentatively identified. Sonar detected a large metal object 140 ft. below the surface, and deep-diving submersibles went down to inspect it. There was speculation that the object might be Challenger's main cabin, although a more likely possibility was that it was one of Challenger's three main engines, which could have fallen in a cluster. But Coast...