sonar

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Related to Sonars: Sound navigation and ranging

so·nar

 (sō′när′)
n.
1. A system using transmitted and reflected underwater sound waves to detect and locate submerged objects or measure the distance to the floor of a body of water.
2. An apparatus, as one in a submarine, using sonar.
3. Echolocation.

[so(und) na(vigation and) r(anging).]

sonar

(ˈsəʊnɑː)
n
(Electronics) a communication and position-finding device used in underwater navigation and target detection using echolocation
[C20: from so(und) na(vigation and) r(anging)]

so•nar

(ˈsoʊ nɑr)

n.
1. a method for detecting and locating objects submerged in water by echolocation.
2. the apparatus used in sonar.
[1940–45; so(und)na(vigation)r(anging)]
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sonar
An electrical impulse is converted into sound waves that are transmitted underwater. The sound waves are reflected off objects in their paths, creating echoes that return to the vessel and are picked up by the sonar equipment.

so·nar

(sō′när′)
1. A method of detecting and locating underwater objects, such as submarines or schools of fish, through the use of reflected sound waves. Because the speed of sound in water is constant (about 4,800 feet, or 1,463 meters, per second), the time it takes for a transmitted signal to reach an object and return can be used to calculate the object's distance.
2. The equipment used in doing this.

sonar

A sonic device used primarily for the detection and location of underwater objects. (This term is derived from the words "sound navigation and ranging.")
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sonar - a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to returnsonar - a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
navigational instrument - an instrument used for navigating
pinger - a pulse generator used for echo sounding in sonar
pulse generator - a generator of single or multiple voltage pulses; usually adjustable for pulse rate
pigboat, submarine, U-boat, sub - a submersible warship usually armed with torpedoes
Translations
kaikuluotain

sonar

[ˈsəʊnɑːʳ] Nsonar m

sonar

[ˈsəʊnɑːr] nsonar m

sonar

nSonar(gerät) nt, → Echolot nt

sonar

[ˈsəʊnɑːʳ] nsonar m inv
References in periodicals archive ?
Coda Octopus Group announced the full launch of its fourth-generation range of sonars, the Echoscope4G series.
Side-scan sonars emit pulses down towards the seafloor across a wide-angle while being towed from a boat.
The biggest change that UWSU will deliver will be the addition of more "active" sonars, which will replace the previous dependency on "passive" sonars.
Phoenix's side scan sonar, which can create an image of large areas of the sea floor, will be towed from behind a Chinese Rescue Ship. Known as the Phoenix Synthetic Aperture Sonar, the piece of equipment that will be used is more accurate than the traditional 75 kHz side sonars that were used over the past two years, noted Phoenix officials, who also said their gear offers a "higher degree of resolution," especially at the outer ranges of sonar.
Office of Naval Research (ONR) has developed advanced synthetic aperture sonars for detection, localization, and classification (DLC) of mines, for protection of sea lines of communication and naval operating areas, and for support of amphibious operations.
Speaking at the launch, Rob Balloch, Strategic Development and Marketing Director at Sonardyne said, “Conventional obstacle avoidance sonars have an operating range of just a few hundred metres so their use is often limited to navigating an SDV or submersible during its final approach to the target.
In the mid-1990s high frequency multi-beam sonars were identified as the most promising assets to develop swimmer detection systems.
Two Model 1512 Pipe Profiling Sonars have been bought from Marine Electronics Ltd, UK, by the National Water Main Cleaning Co.
IMMP and other groups have been pressing for years to curtail the use of intense military sonars, which blast some of the loudest underwater sounds ever produced by humans.
The investigation team concluded, "Tactical mid-range frequency sonars aboard US Navy ships ...
At their source, ATOC'S sonars, in action since December 1995, produce a deafening 195 dB.
The Navy, however, is complaining to Congress, trying to push legislative exemptions that would prevent any restrictions from being imposed on the use of LFA Sonar and similar intense sonars.