Solid copper? Or perhaps sintered bronze?
Solid copper could be a DIY grounding plate, but the Dynaplate is sintered (foamed metal, lots of air in it) bronze. A dynaplate is a radio ground, and can actually be dangerous if you use it as a lightning ground. If a zillion volts goes through it, all the water in all the spaces in the sintered metal superheats and turns to steam, with explosive results that can blow the plate and a big hole in your hull.
So take a look inside the boat. A Dynaplate is a good thing for radios, but if the PO was foolish enough to use it for the lightning ground as well, you'd want to relocate that connection ASAP. If you have an external metal keel, usually the lightning ground would be factory connected to that, directly.
Solid copper could be a DIY grounding plate, but the Dynaplate is sintered (foamed metal, lots of air in it) bronze. A dynaplate is a radio ground, and can actually be dangerous if you use it as a lightning ground. If a zillion volts goes through it, all the water in all the spaces in the sintered metal superheats and turns to steam, with explosive results that can blow the plate and a big hole in your hull.
So take a look inside the boat. A Dynaplate is a good thing for radios, but if the PO was foolish enough to use it for the lightning ground as well, you'd want to relocate that connection ASAP. If you have an external metal keel, usually the lightning ground would be factory connected to that, directly.
