The Development of Radar and Sonar
Overview
Although they rely on two fundamentally different types of wave transmission, Radio Detection And Ranging (RADAR) and Sound Navigation and Ranging (SONAR) b...
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Sonar
The concept of using sound to determine the depth of a lake or ocean was first proposed in the early nineteenth century by the French physicist Francois Arago (1786-1853); however, for nearly a ...
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Sonar
Sonar is a remote sensing technique based on the echolocation of sound waves in water. The name Sonar is short for SOund Navigation And Ranging and is closely related to the technology of RADAR ...
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A federal appeals court on Tuesday ordered the U.S. Navy to lessen the harm its high-power sonar does to whales and other marine life during exercises off the Southern California coast.The 9th Circ...
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The Defense Department gave the Navy permission Tuesday to keep training with sonar for another two years, a move denounced by activists who say the sound waves can harm dolphins and other marine m...
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A naval exercise off the Australian coast using submarine-hunting sonar could kill whales or cause them to become stranded, the International Whaling Commission warned in a report.Environmental gro...
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The Navy says it won't comply with sonar training restrictions that aim to protect marine mammals off the California coast, arguing that the commission that imposed the rules does not have the juri...
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The state agency charged with protecting California's coast argued Tuesday against President Bush's exemption of the Navy from environmental laws that would restrict use of high-power sonar off the...
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A federal judge on Thursday temporarily lifted some restrictions on the Navy's use of high-power sonar during training exercises near Southern California after President Bush got involved in the ca...
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A federal judge ordered the Navy on Thursday to adopt measures that would lessen the impact of sonar on whales and other marine life during exercises near Southern California.The preliminary injunc...
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The Navy is refusing to detail its sonar use for a federal court in a case involving potential harm to whales, saying the information could jeopardize national security.Complying with a federal jud...
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A federal judge has banned the Navy from using high-power sonar during exercises off the Southern California coast, ruling that the strong underwater sounds can cause widespread damage to whales an...
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The Development of Radar and Sonar
Sonar
Sonar
Court: Navy must lessen sonar harm
