BoatHowTo · video

What this video covers

Lightning strikes on boats cannot be fully prevented, and true lightning protection systems serve only to minimize structural damage rather than safeguard sensitive electronics.0:03 Nigel Calder explains that while a masthead lightning rod connected to an underwater ground plate via a heavy-duty conductor can direct a strike, induced voltages will likely still destroy onboard electronic systems.1:09 For a powerboat stored on a lift, installing a temporary, plug-in lightning rod is impractical due to the requirement for a massive four-gauge conductor and a high-quality ground connection.1:54 A more effective, though still imperfect, strategy involves installing a permanent, high-reaching lightning rod on the adjacent dock, though this does not eliminate the risk of damage from induced currents.2:32 Surge protection devices adapted from the solar industry offer some potential for future mitigation, but widespread, effective solutions for marine environments remain limited.3:48 Comprehensive lightning protection requires bonding all metal masses and rigging, a complex and expensive retrofit that often necessitates removing interior furniture.4:40

More from BoatHowTo

Grounding on Aluminium Yachts 🔧 | Ask The Expert with NIGEL CALDERSept 2026Boat ELECTRIC PROPULSION with only LEAD ACID Batteries ?? | Ask The Expert with NIGEL CALDERSept 2026MaxProp: More Pitch in Reverse than in Forward? 🤔 | Ask The Expert with NIGEL CALDERSept 2026Common Ground Point with Isolated Saildrives | Ask The Expert with NIGEL CALDERSept 2026

From BoatHowTo — see the channel’s boat, crew, and every analysed video.

The Sailing Directory Newsletter

One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.