NDB's on moored ships across the atlantic,
Did they really moor ships across the atlantic with NDBs on it? I find that hard to believe.
First, the Atlantic is pretty deep (3.3 km on average, according to Wikipedia) so anchoring is a major, major undertaking. And then you get the economic argument: Who is going to pay for all of this, including salaries of crews plus the infrastructure to bring them to the ships and back, fuel for the generators and whatnot. And it most be boring as hell for the crews.