The general outline of Operation Neptune including Chain of Command during opening Phases; Allocation of Warships to Home Commands both during and after Assault phase; Allocation of Coastal Forces to Home Commands both during and after assault phase; Allocation of Warships to Task Forces both during and after Assault phase; Allocation of coastal forces to task forces both during and after assault phase; allocation of landing ships and craft including Naval assault forces, Commando-Ranger Lift and Craft, Barges and Fuelling Trawlers for the Ferry Service; Enemy Intelligence; Division of Enemy Coast into Sectors and charts of underground obstacles of Juno beach, Gold beach, Utah beach, Omaha beach and sword beach.

Administrative / biographical background
During WWII a level of clearance called "Bigot" was adopted by the allies. This was in order to create a smaller circle of individuals who were cleared to know information.