Copper anode ?

[Rappey]

A friends boat has a copper anode on his hull, maybe 15mm thick 250x 75. Guessing a little as not seen the outside myself.
Inside a strip of copper connects to the anode stud, around 50mm wide but more like thick foil. This copper strip seems to randomly spread tree like horizontally and vertically inside various lockers but not terminate to anything ?
The highest strip reaches to the under deck area and has a 12mm hole in the end but there is nothing in that area it could bolt to. Interior is original
The only guess I could think was lightning conductor, but the strips are so thin, similar thickness to copper strips that used to go around doors as draught excluder.
Someone will know ?

 

[greeny]

Could it be a ground plane?

 

[Deleted member 478]

Sounds more likely to have something to do with a SSB radio.
Edit: @greeny was faster than me, yep, a ground plane

 

[pvb]

It should be porous bronze, and it's a grounding plate, usually used for SSB radios.

 

[lw395]

That's probably an HF radio ground.
Copper is no use as an anode, being at the wrong end of the electrochemical series. But commercial vessels use 'anodes' of various metals with a powered voltage source. It's always possible your mate has some DIY version of that?
Or maybe it's to attract fish.....

 

[Rappey]

I like the sound of ssb/ hf and ground plane. It does have an insulated back stay but no radio inside to go with it. It's a 28yr old rustler 36. Was owned by uk military in Germany for many years and can't think of many things the boat does not have.

This forum is superb when one has questions like this ?