Public domain
U.S. Chief Signal Officer inspects new radio equipment for talking to Aviators in flight. The new aircraft-radio equipment designed by both the Signal Corps of the War Department permits of both radiotelephone and radiotelegraph communication, sending, receiving, at the same time. The apparatus is u
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Subjects
Credit lineU.S. Chief Signal Officer inspects new radio equipment for talking to Aviators in flight. The new aircraft-radio equipment designed by both the Signal Corps of the War Department permits of both radio. 1928-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.
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