Empire ship the Normandy invasion depended on the successful construction of the Mulberry ports. These were prefabricated ports, constructed at Southampton, Gosport, Portsmouth, Tilbury Docks, and even as far north as Birkenhead and Hartlepool. Two hundred tugs then took three months to tow the components of the harbours from where they were constructed to assembly areas on the South Coast. Between 7 June 1944 and the end of July, the tugs towed the materials across the channel to Normandy. Before D-Day, sixty old merchant ships and four old warships were selected as blockships, to be scuttled in a line to give protection
The D-Day Story in D-Day and the Battle of Normandy. The embroidery took five years to complete and measures long. Film clips of veterans talking about their experiences give visitors further insight into what took place. The museum is run by Portsmouth Museum Services, a branch of Portsmouth City Council, and is supported by Portsmouth D-Day Museum Trust, a registered charity. The museum closed in March 2017 to undergo a £5 million refurbishment and allow for conservation work on exhibits. New exhibits include the "pencil that started the invasion" – the pencil used by Lt. Cdr. John Harmer to sign the order for