Antedating of "Sonar"

[Fred Shapiro]

sonar (OED 1946)

1945 _Chicago Defender_ 16 June 5 (ProQuest Historical Newspapers)
(caption) The school, which holds A-1 priority among Navy service schools,
trains men to maintain and repair the intricate radar, radio, and sonar
equipment now on Navy ships.

Fred Shapiro


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