[RightWhale]

current flowing through a wire will produce EMF

It might. A steady current will not radiate, but the varying movement of the entire vehicle, wires and all, could produce this. Not counting the effect of the rotation of the planet, which tends to be smooth.

[Gaffer]

My guess is that some digital engineer has figured out how to maximize something and has pulsed the supply to get better efficiency....just a guess...

[Elsie]

Not counting the effect of the rotation of the planet, which tends to be smooth.

Not really...

 

 

http://maia.usno.navy.mil/eop.html