U.S. Navy Grumman S-2E <i>Tracker</i>s of Anti-Submarine Squadron 33 (VS-33) "Screwbirds" in flight, circa 1971. VS-33 was assigned to Carrier Anti-Submarine Air Group 59 (CVSG-59) aboard the aircraft carrier USS <i>Ticonderoga</i> (CVS-14).
U.S. Navy
<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/ah197104.pdf">April 1971</a>, p. 67.