[Homer_J_Simpson]

[On] November 15, 1939, when Hitler was trying vainly to buck up his generals to launch an attack in the West, Raeder instructed the Naval War Staff to examine “the possibility of invading England, a possibility arising if certain conditions are fulfilled by the further course of the war.” It was the first time in history that any German military staff had been asked even to consider such an action. It seems likely that Raeder took this step largely because he wanted to anticipate any sudden aberration of his unpredictable Leader. There is no record that Hitler was consulted or knew anything about it. The furthest his thoughts went at this time was to get airfields and naval bases in Holland, Belgium and France for the tightening of the blockade against the British Isles.

William L. Shirer, The Rise and Fall of the Third Reich

[Homer_J_Simpson]

First Lord to First Sea Lord 15.XI.39

Pray let me have details of the proposed first Canadian convoy. How many ships, which ships, how many men in each ship, what speed will convoy take, escort both A.S. and anti-raider? Place of assembly and date of departure should be mentioned verbally.

Winston S. Churchill, The Gathering Storm

[BroJoeK]

"[On] November 15, 1939, when Hitler was trying vainly to buck up his generals to launch an attack in the West, Raeder instructed the Naval War Staff to examine “the possibility of invading England, a possibility arising if certain conditions are fulfilled by the further course of the war.” It was the first time in history that any German military staff had been asked even to consider such an action. "

Almost certainly not true. In his 2004 book "Target America," James Duffy discusses German military contingency plans -- called Winterarbeiten -- going as far back as the late 1800s -- for a German invasion of the United States!

Duffy does not mention German plans to invade Britain, but it's hard to imagine they would assign staff officers for the US invasion until after they had fully examined requirements to invade a more likely future enemy, much closer to home.