Quote Originally Posted by Norman View Post
Watercraft protectors

A lightning protection installation on a watercraft comprises a lightning protector mounted on the top of the mast or superstructure and a grounding conductor in contact with the water. Electrical conductors attach to the protector and run downward to the conductor. For a vessel with a conducting (iron or steel) hull, the grounding conductor is the hull. For a vessel with a non-conducting hull, the grounding conductor may be retractable, part of the hull, or attached to a centreboard.

A modern cruise ship is well insulated against a lightning strike, would not stop a burn mark appearing if struck. People on the deck are not insulated, and could attract a lightning strike with fatal consequences.
Thank you for the technical review about the Watercraft protectors.
I thinked that should be something on ship for storms.