I havent' been following this thread so the following may already have
been posted, but I was reading an old copy of "Royce's" which says on a
rig with aluminum mast and stainless steel rigging the ground must be
connected to the mast not the rigging (eg chainplate) because stainless
steel is a very poor conductor of electicity compared to aluminum. If hit
the charge will travel down the mast, not the shrouds. The book recommends
a copper ground from the mast to a copper plate attached to the exterior of
the hull below the waterline.
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