A lovely detailed shot showing what appears to be the servicing of an engine on a wartime flying boat, identified as a Short Sunderland.  Note the hanging platforms - no opportunity to use ladders when it's sitting on the water!
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/24469639@N00">whatsthatpicture</a> from Hanwell, London, UK
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/whatsthatpicture/4804709087/">Servicing an engine on a Short Sunderland flying boat</a>