A U.S. Navy Sikorsky SH-3A <i>Sea King</i> of Helicopter Anti-Submarine Squadron 4 (HS-4) "Black Knights" makes the first ground controlled approach landing at NAAS Ream Field, Imperial Beach, California (USA), circa 1964.
U.S. Department of Defense
<a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/department_arch.html">U.S. Navy All Hands magazine</a> <a rel="nofollow" class="external text" href="http://www.navy.mil/ah_online/archpdf/ah196410.pdf">October 1964</a>, p. 43.