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: a method or device for detecting and locating objects especially underwater by means of sound waves sent out to be reflected by the objects
also : a device for detecting the presence of a vessel (such as a submarine) by the sound it emits in water
Example Sentences
They detected the submarine by using sonar.
Recent Examples on the Web Fish and Game hasn’t started counting the sockeye on the Kenai River yet, but the Kasilof River counts are ticking up, with 36,291 sockeye having passed the sonar as of Wednesday, according to Fish and Game. 
Elizabeth Earl For Alaska Journal Of Commerce, Anchorage Daily News, 24 June 2022 Advances in sonar allowed United States ships to measure the ocean floor in deep water but not in the shallows surrounding land masses. Andrew Dubbins, Smithsonian Magazine, 18 Aug. 2022 The marine biologists behind eco-tour operator Dyer Island Cruises can answer questions on everything from habitat threats to dolphin sonar. Jen Murphy, WSJ, 17 Aug. 2022 Bush and other researchers will spend a week on a research vessel in the water off Attu, surveying below using sonar and remotely operated vehicles to search for the wreckage. Morgan Krakow, Anchorage Daily News, 13 Aug. 2022 Initial sonar surveys suggest there still could be thousands of physical barrels underwater filled with who knows what. Rosanna Xiastaff Writer, Los Angeles Times, 4 Aug. 2022 Higher-resolution sonar picked up individual clusters of animals and more subtle movements up and down. Katherine Harmon Courage, Scientific American, 1 Aug. 2022 Sodefor has even deployed sonar and divers to retrieve logs that spilled into the river during a storm. New York Times, 14 June 2022 Intense searches followed, with San Diego Fire-Rescue lifeguards aboard rescue vessels and watercraft using sonar to aid in scuba diver searches. Teri Figueroa, San Diego Union-Tribune, 13 July 2022 See More
Elizabeth Earl For Alaska Journal Of Commerce, Anchorage Daily News, 24 June 2022 Advances in sonar allowed United States ships to measure the ocean floor in deep water but not in the shallows surrounding land masses. Andrew Dubbins, Smithsonian Magazine, 18 Aug. 2022 The marine biologists behind eco-tour operator Dyer Island Cruises can answer questions on everything from habitat threats to dolphin sonar. Jen Murphy, WSJ, 17 Aug. 2022 Bush and other researchers will spend a week on a research vessel in the water off Attu, surveying below using sonar and remotely operated vehicles to search for the wreckage. Morgan Krakow, Anchorage Daily News, 13 Aug. 2022 Initial sonar surveys suggest there still could be thousands of physical barrels underwater filled with who knows what. Rosanna Xiastaff Writer, Los Angeles Times, 4 Aug. 2022 Higher-resolution sonar picked up individual clusters of animals and more subtle movements up and down. Katherine Harmon Courage, Scientific American, 1 Aug. 2022 Sodefor has even deployed sonar and divers to retrieve logs that spilled into the river during a storm. New York Times, 14 June 2022 Intense searches followed, with San Diego Fire-Rescue lifeguards aboard rescue vessels and watercraft using sonar to aid in scuba diver searches. Teri Figueroa, San Diego Union-Tribune, 13 July 2022 See More Word History
Etymology
sound navigation ranging
First Known Use
1943, in the meaning defined above
Time Traveler
The first known use of sonar was in 1943 Phrases Containing sonar
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