TAMING THE DRAGON
DAMAGE FROM A STRIKE
The current flow and heat from a direct lightning strike can cause catastrophic damage to an unprotected boat. A strike on the masthead may streak through the stays or arc from a shroud chain plate to the water, burning a mark down the side of the boat, and mast-mounted components (wind instruments, TV antennas, radar, lights) will likely be destroyed. If the current passes through an ungrounded mast to the keel, it may burn a hole in the bottom of the boat or start a fire below decks. If the current encounters poor conductors such as fiberglass, plastics, wooden bulkheads or teak decking, the heat can literally atomise, melt or ignite them.
On its way to the water, the current can arc across any gaps in its path or cause ‘side flashes’ to other conductive objects and equipment. A surge of current to or through delicate electronics, electrical devices or electric motors will either destroy them outright or disable them. Surge protectors (or transient voltage surge suppressors) may shield electrical equipment from damage by routing
