Map of Admiralty facilities on the Isle of Portland, Dorset
<a href="//commons.wikimedia.org/wiki/User:Goran_tek-en" title="User:Goran tek-en">Goran_tek-en</a>
CC BY-SA 4.0
<p>Own work based on:<br><span style="color:#69F">✦ </span><a href="//commons.wikimedia.org/wiki/File:Portland,_showing_the_locations_of_HMS_Osprey_and_the_Admiralty_Underwater_Weapons_Establishment.png" title="File:Portland, showing the locations of HMS Osprey and the Admiralty Underwater Weapons Establishment.png">Portland, showing the locations of HMS Osprey and the Admiralty Underwater Weapons Establishment.png</a> <i>by</i> <a href="//commons.wikimedia.org/wiki/User:SchroCat" class="mw-redirect" title="User:SchroCat">SchroCat</a><br><span style="color:#69F">✦ </span><a href="//commons.wikimedia.org/wiki/File:Maps_template-en.svg" title="File:Maps template-en.svg">Maps template-en.svg</a> <i>by</i> <a href="//commons.wikimedia.org/wiki/User:Sting" title="User:Sting">Sting</a><br><span style="color:#69F">✦ </span><a href="//commons.wikimedia.org/wiki/File:BlankMap-World_gray.svg" title="File:BlankMap-World gray.svg">BlankMap-World gray.svg</a> <i>by</i> <a href="//commons.wikimedia.org/wiki/User:LivingShadow" title="User:LivingShadow">LivingShadow</a><br><span style="color:#69F">✦ </span><a href="//commons.wikimedia.org/wiki/File:Isle_of_Portland_OS_map.jpg" title="File:Isle of Portland OS map.jpg">Isle of Portland OS map.jpg</a> Director General of the Ordnance Survey, UK
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Derived from;
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<ul><li><a rel="nofollow" class="external text" href="https://www.openstreetmap.org/#map=13/50.5479/-2.4739">OSM</a></li>
<li>Requested by and knowledge from <a href="//commons.wikimedia.org/wiki/User:SchroCat" class="mw-redirect" title="User:SchroCat">SchroCat</a></li></ul>