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SONAR, as it is most commonly known as has been around since the beginning of time. Animals have used this technique and survived because of it for millions of years. Among the most common are bats and dolphins. ... But enough of the cute animals, lets talk about what Sonar is, and how we have utilized it.
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ffden-2.phys.uaf.edu/212_spring2007.web.dir/charles_raa...
ffden-2.phys.uaf.edu/212_spring2007.web.dir/charles_raabe/sonhome.htm
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The time taken for an acoustic beam to travel to the object and back to the source enables the distance to be found since the velocity of sound in water is known. Sonar devices, or echo sounders, were developed in 1920, and are the commonest ... Sound navigation and ranging; Sound Nonviolent Opponents of War; Sound object;
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encyclopedia.farlex.com/Sound+navigation+and+ranging
encyclopedia.farlex.com/Sound+navigation+and+ranging
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Using bathymetry data and elevation data, a full topographic-bathymetric (topobathy) model of Tampa Bay was developed as a joint effort between National Oceanic and Atmospheric Administration (NOAA) and the USGS.
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gulfsci.usgs.gov/dev/tampabay/data/1_bathymetry_sonar/i...
gulfsci.usgs.gov/dev/tampabay/data/1_bathymetry_sonar/index.html
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As the technology of sonar (an acronym for Sound Navigation and Ranging) has developed, prices have dropped dramatically at the same time that choices have widened. ... It will have some mechanism to display the results, ranging from a flashing light to color LCD graphic maps. Dedicated units often have some controls...
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www.boatus.com/boattech/SelectTransducer.htm
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Sonar (sound navigation and ranging), method for locating objects by the reflection of sound waves. It is used naturally by such animals as BATS and DOLPHINS to locate food and obstacles. Sonar was first developed - as a practical method of detecting underwater hazards (eg, submarines, icebergs) and for measuring...
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www.canadianencyclopedia.ca/index.cfm?PgNm=TCE&Params=A...
www.canadianencyclopedia.ca/index.cfm?PgNm=TCE&Params=A1ARTA0007562
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Sonar (sound navigation and ranging), method for locating objects by the reflection of sound waves. It is used naturally by such animals as BATS and DOLPHINS to locate food and obstacles. Sonar was first developed - as a ... Sonar was first developed - as a practical method of detecting underwater hazards (eg,
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www.thecanadianencyclopedia.com/PrinterFriendly.cfm?Art...
www.thecanadianencyclopedia.com/PrinterFriendly.cfm?ArticleId=A0007562
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Bats navigate the night by a natural system of echo sounding, much like the Navy's elaborately developed sonar (for sound navigation and ranging). They send out pulsed ultrasonic squeaks... ... Zoologist Donald R. Griffin of Harvard, an authority on bat navigation, has long suspected that birds living a batlike life...
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www.time.com/time/magazine/article/0,9171,890681,00.htm...
www.time.com/time/magazine/article/0,9171,890681,00.html
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Britannica online encyclopedia article on sonar, (from “sound navigation ranging”), technique for detecting and determining the distance and direction of underwater objects by acoustic means. ... sound ranging (acoustics)
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www.britannica.com/EBchecked/topic/554214/sonar
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Sonar (sound navigation and ranging) is a technology that uses acoustical waves to sense the location of objects in the ocean. The simplest sonar devices send out a sound pulse from a transducer, and then precisely measure the time Sonar was developed during World War I as an aid in finding both submarines and icebergs.
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www.dosits.org/gallery/tech/at/s1.htm
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