Sonar fieldwork - Parviz Babai, 1976

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Description: (curated)

Parviz Babai monitors a compass mounted on a pole on board a vessel at sea, in 1975; possibly related to fieldwork-testing with rotary sonar. [N.B. apparently incorrect date (76) written on slide by Edgerton] (CC)

HEE-SC-02947

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