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Results for sonar:

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sidescan sonar
SYNONYMS OR RELATED TERMS: side-scan sonar, side-scan sonograph, side-scanning sonar
CATEGORY: technique
DEFINITION: A survey method used in underwater archaeology which provides the broadest view of the sea-floor and its texture. An acoustic emitter is towed behind a vessel and sends out sound waves in a fan-shaped beam. These pulses of sonic energy are reflected back to a transducer and recorded on a rotating drum.
sonar
SYNONYMS OR RELATED TERMS: sonar survey; sound navigation ranging
CATEGORY: technique
DEFINITION: Form of underwater detection based on sound waves.

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