View of a U.S. Navy Douglas R5D <i>Skymaster</i> of VXE-6 at Williams Air Facility, Antarctica, circa in 1957. A special cover is used to pre-heat an engine.
USN
<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/ah195704.pdf">April 1957</a>, p. 12.