Six H-39 battleships appear in September 1939

How could Germany use six suddenly available H-39 battleships on 1 September 1939?

After months of integration, Germany could send them out in hunter groups, but their appearance would provoke a massive British construction, air, submarine, carrier, and fleet response.

Germany would first need crews, support, and port arrangements, delaying useful employment for perhaps six months. Once ready, the battleships could enter the North Atlantic as alternating hunter groups of roughly three ships. Britain would cancel any capital-ship pause, accelerate the Lions and King George V class, operate major ships in pairs, expand Coastal Command, and make the H-39s the RAF's highest-priority targets. Royal Navy submarines could also be withdrawn from the Far East to watch German ports, while fast carrier groups prepared to intercept any breakout.