Sono-radio-buoy deployed in the Aleutians for RAR work.Buoy deployed from the PIONEER
3/20/2019 12:32:36 PM
Date: 1940
Credit: Captain Harry D. Reed, C&GS;
Location: Islands of the Four Mountains, Aleutian Islands
Subject: Charting
Subject: Navigation
Subject: Electronic
Subject: Radio-Acoustic Ranging