Evan,
I admit that I am not an expert in antenna theory, but the object of this
exercise is to establish a reflective ground plane for your long wire. The
obvious choice is the ocean. Why would anybody string anything inside the
hull? Not only would this wire be subject to corrosion due to electrolysis,
but this wire will always be less than optimum. What is wrong with an
insulated (from the hull) carbon block on the bottom of the boat with a
connecting stud for connection inside? This should deliver the required
connection without risk of corrosion.
Steve

"Evan Gatehouse" wrote in message
news:B3kPi.10444$th2.2814@pd7urf3no...
Never seen this discussed befo

Could I use thin stainless steel foil instead of copper foil in the bilge
as a ground for a long wire (backstay antenna) ham radio setup?

Evan Gatehouse