A U.S. Navy Consolidated PBY-5A <i>Catalina</i> patrol plane streaming a magnetic anomaly detection ("MAD") "Bird", 29 May 1943. The plane appears to also have a "MAD" boom in her tail.
U.S. Navy, photographed by Fleet Air Wing 9 (FAW-9).
Official U.S. Navy photo <a rel="nofollow" class="external text" href="http://www.history.navy.mil/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/80-G-383000/80-G-383725.html">80-G-383725</a> from the U.S. Navy <a rel="nofollow" class="external text" href="http://www.history.navy.mil">Naval History and Heritage Command</a>