A continuously watched corridor between Britain and Norway replaces an exact recreation of the First World War North Sea barrage. Aircraft can refuel on either shore, while convoy escorts, motor torpedo boats, mines, and patrol aircraft force German boats to submerge or risk quick detection. The shorter Scotland-Norway patrol leg also reduces the number and range of Coastal Command aircraft needed for persistent coverage. The result resembles a compressed Bay of Biscay problem for Germany because the routes are predictable, constrained, and costly to transit.
Chapter · 1:27:56-1:37:02
The North Sea as a barrier against U-boats
Aircraft shuttling between Britain and Norway, minefields, escorts, and patrols turn the North Sea into a dense anti-submarine zone.