[Lion Den Dan]

In WWII, floating piers were fabricated in the U.S (out of concrete I think) and towed to Europe. If memory serves, they were a big part of the Normandy invasion. Those fabrications seemed to handle the channel weather. What technology have we lost since then?

[JewishRighter]

The Mulberries, the temporary Normandy piers were actually made out of concrete in England and floated to their locations. They were very substantial, but the one at Omaha did not survive a very severe Channel storm within two weeks of the invasion. The one at Gold was used for eight months and landed a tremendous amount of men and materiel.