A large portable harbour is transported across the Channel for D-day.
Item title reads - D-day secret revealed. Factory made invasion port.
Aerial shots of parts of mulberry harbour at sea making their way to France. M/S as wrecked landing craft is blown up to give a clear path. Various shots of a section of the harbour in the position. The camera pans across harbour assembled off Arromanches. C/U map of the port. M/S of ships in harbour. Various shots of British vehicles (TCVs) leaving LCT and driving to shore along harbour ramp. Various shots of the second harbour wrecked by bad weather, it blows about in the gale. M/S British Sherman tank leaving LCT and travelling along harbour ramp to beach.