The Secret map below shows how any Thames Barges would have made their way past the Shoebury boom (still there!) round to the South Coast where they gathered for the massive D-Day invasion.
Secret Buoyage Chart showing route almost from Canvey to Caen!
Not conclusive evidence but
Concrete Definitely played a major part in the D-Day landings! Below is a photo
of a complete Mulberry Harbour during the D-Day invasion at Normandy.
Can you spot a FCB?
Normandy today with that familiar Concrete Ribbed Construction - The FCB's big brother!
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For an excellent explanation and account of Mulberry Harbours click on the picture below..
Press to visit the excellent 'HyperWar' website