This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
architecture Fleet Training Center Oahu Territory of Hawaii September . Shown Sonar laboratory with the installation of complete sonar equipment on elevated platform. Associated equipment Attack Plotter and Sound Range Recorder mounted on deck alongside. Official U.S. Navy Photograph now in the collections of the National Archives.