Originally Posted by reed1v
Stray current protection is vastly different than lightning protection. Zincs handle the strays quite well. Since you have a kitty, why not run a 4 gauge copper rod/strap configuration from the mast down through the deck
into the water so there is a straight line path for lightning to take if it so wished to do so. ...
You could save a lot on weight by using pipe instead of a cable.
The instantaneous current is only on the outside of the conductor,
which means you need only the outer circumference to carry current.
Even better, however, would be a wide strip of aluminium.
You can get rolls of the this which you could easily deploy and easily stow.
An original lightning pipe discussion was here:
The difference being that a wire too thin will explode (detonate, violently)
and a wire too thick is just one more heavy thing to be hauling around
for that brief moment when you need it.
Hope this helps