A Boeing-Vertol CH-47 <i>Chinook</i> arrives on board the U.S. Navy aircraft carrier USS <i>Hancock</i> (CVA-19) during "Operation Frequent Wind", the evacuation of South Vietnam, in April 1975. The CH-47 was most probably from the Vietnam Air Force, although it wears the tail code "YH" of Marine Heavy Helicopter Squadron 463 (HMH-463), which was based on the <i>Hancock</i> for "Operation Frequent Wind". The Marines did not operate the <i>Chinook</i>.
U.S. Navy
<a rel="nofollow" class="external text" href="http://collections.naval.aviation.museum/emuwebdoncoms/pages/doncoms/AdvQuery.php">U.S. Navy National Museum of Naval Aviation</a> photo No. <a rel="nofollow" class="external text" href="http://collections.naval.aviation.museum/emuwebdoncoms/pages/doncoms/Display.php?irn=33607&amp;QueryPage=%2Femuwebdoncoms%2Fpages%2Fdoncoms%2FAdvQuery.php">1996.488.054.107</a>