Bob Markus wrote:
I agree, does not seem likely. I'm a ham and lots of experience with VHF.
Cannot explain it and I do not know why. But we could not receive with the
Nav. lights on.

LED lights are generally pulsed to save power. Crude electronics plus a
long wire antenna up the mast radiating like crazy all the way fronm DC
to almost light. A few turns through a ferrite ring at each end of the
cable would probably help but there is no substitute for proper EMC
filtering. YMMV.