<p>I spotted two of these shipping container sangars on my travels. They are constructed by placing a small 10ft cube container on top of a 20ft container, The upper container has the doors sealed, but access is gained by a new hatch and ladder from underneath into the larger container below. The top container, as well as having loopholes cut into the steel, has been clad in a second layer of steel; presumably for ballistic protection. Protection for the ground level container appears to have come from earth banks. The entrance is 
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<p>The airbase at RAF Mount Pleasant was announced in 1983 and subsequently opened in 1985 primarily as a fighter airbase on the Falkland Islands. Following the conflict in 1982 a small airbase was located at the only existing hard runway on the islands 27 miles wast at Port Stanley (RAF Stanley).
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As part of this military installation in what was a recent conflict zone, it was necessary to construct a number of field defences to ensure the security and protection of the airbase. It is likely these were constructed in the early days of the construction of the airfield and formed part of the defensive plan. The examples I have selected to record are beyond the current perimeter of the airbase and located immediately beside the civilian road. They all appear in a poor state of repair and I have assumed they are no longer maintained. They likely still form part of the outer line of field defences.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/147447263@N02">Nick /</a> from United Kingdom
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/intrepidexplorer82/51070420708/">Shipping Container Sangar</a>