Detecting-ranging portable sonar set made by Futuronics Corp. for use by Navy scuba divers, measuring approximately 12″ in diameter and 11″ tall, with knobs on top for "Freq. Control," "Gain," and "Range Listen." Affixed inside is the partial Futuronics label, identifying it as "AN/PQS-1D, Detecting-Ranging Set, Sonar…Serial A00025." In very good to fine condition, with toned adhesive over the inner labels.
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