Mulberry Harbours

The excellent Drachinifel's latest video on Youtube is about the Mulberry Harbours and how they were conceived, made and used. Many of his naval warfare videos cover the engineering aspects of naval history and are very well researched and presented.

It is surprising how much remains today of items that were only expected to have a short shelf life.

 

I believe a pair of 'stranded' caissons were located in Portland Harbour.
I recall seeing them around 7 or 8 years ago and Google Maps would seem to still show them (but don't know when their aerial survey took place).
I think another exists in Wareham Channel, Poole Harbour fairly close to Rockley Park.
All well settled in the respective Harbour floors so little chance of floating them anywhere else.

 

My late father talked about the joys of reversing - at speed down them

 

Still there in May 2019. https://www.google.co.uk/maps/@50.5...w=99.5494&pitch=0&thumbfov=100!7i13312!8i6656

 

There is a phoenix cassion off Littlestone on Sea, Kent. It's a scheduled ancient monument.