sonar

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“
Chief Justice John Roberts raised the specter of an undetected "North Korean diesel submarine to get (closer) to Pearl Harbor" if sailors couldn't train with sonar, and Associate Justice Samuel Alito asked pointedly if a judge could be considered "an expert on anti-submarine warfare."

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Definitions (4)

Toggle American Heritage definitions American Heritage Dictionary (3)

  1. noun 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. noun An apparatus, as one in a submarine, using sonar.
  3. noun Echolocation.

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Examples (46)

  • We make maps of these mountain ranges with sound, with sonar, and this is one of those mountain ranges. —  David Gallo on life in the deep oceans
  • Painted in shades of sonar, the gallery stretched beyond his sensors' range. —  EBSCOhost
  • Using its sonar, the Autosub will pick its way through the water, while creating a three-dimensional map that the scientists can later use to determine the areas most prone to melting. —  EcoEarth.Info Environment RSS Newsfeed
  • Geomagnetic interference from elements such as iron ore could also scramble a cetacean's sonar, and complex coastlines such as that of Tasmania could be difficult to navigate, said Kemper, of the South Australian museum. —  Zee News : India National
  • Trainings include the use of sonar, aircraft and missiles and underwater bomb detonations. —  portland indymedia - features
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This word has been looked up 64 times.

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Etymologies (1)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. so(und) na(vigation and) r(anging).
 

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