The names Norway and Denmark are old and predate 1847 by centuries. “German Ocean” is an old term for the North Sea.
Norway was independent from Denmark at that point in time. So it was off the coast of Norway in the German Ocean (North Sea). And the expedition was sent by the king of Denmark, a nearby seafaring nation.
That is a terrible argument. Prior art is not required to be standalone. And if we start requiring it to be standalone, that calls into question almost every game out there. They almost all require some kind of operating system to actually run