On modern sailing boats and yachts, carbon improves performance and design.
But during a storm, it can increase exposure to structural and electronic damage if lightning strikes.
The evolution of boating has led to the widespread use of carbon fibre. Its lightness and mechanical strength have made it the primary material for masts and hulls on modern superyachts. However, when it comes to lightning, carbon introduces risk variables that many boat owners underestimate.
Why carbon behaves differently from metals? Carbon is not aluminium
Unlike traditional metals (such as aluminium or steel), carbon fibre is a “composite” conductor. Although it conducts electricity, it does not do so uniformly. When a traditional lightning conductor attracts a discharge to a carbon tree, the current seeks the shortest path to water.
This is where the problem arises: the resistance offered by the resin that binds the fibres can cause instant overheating.
The result?
Delamination: the fibres separate, compromising the structure of the mast.
Explosion of the material: the internal moisture vaporises instantly, literally causing parts of the composite to explode.
On-board electronics: the Achilles heel
Even if the tree ‘survives’, there is the problem of electronics. Modern boats are packed with home automation and advanced navigation systems. Lightning striking the boat generates an electromagnetic pulse (LEMP) so powerful that it can ‘fry’ the radar, GPS and engine ECUs, even with perfect grounding.
The solution: Don't attract, prevent.
On the open sea, your yacht or sailing boat is often the highest point. Using a system that ‘attracts’ lightning is a miscalculated risk. The Euthalia Marine Antimpatto® System reverses this approach: instead of offering a discharge point, it creates a protective ‘cloak’ that deionises the air around the boat.
The system makes the yacht ‘transparent’ to the storm’s electric field, eliminating the probability that the downward leader (the lightning bolt) will connect with the vessel.
On a carbon hull full of electronics, the only real protection is to ensure that lightning never strikes.
Do not risk your safety at sea. Request a personalised technical analysis for your yacht now.
Want to know how to protect your boat or fleet?
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FAQ — Lightning and carbon components
Does carbon conduct electricity like aluminium?
It conducts electricity, but not as uniformly as metal. Carbon fibre is a composite material: conductivity depends on the orientation of the fibres and the resin that binds them together.
Why can lightning cause delamination or ‘explosion’ of the composite?
When the discharge passes through the composite, the resin can resist it, generating instant heat. This can separate the layers (delamination) and, if there is internal moisture, cause rapid vaporisation with sudden damage to the material.
The system makes the yacht ‘transparent’ to the storm’s electric field, eliminating the probability of the downward leader (lightning) connecting with the vessel.
On a carbon hull full of electronics, the only real protection is to ensure that lightning never strikes.
If I have perfect grounding, am I safe?
Grounding is important, but it does not eliminate all risks. Even with proper grounding, lightning can cause structural damage to composites and, above all, electronic damage due to the electromagnetic pulse.
What is LEMP and why does it damage electronics even without visible damage?
LEMP (Lightning Electromagnetic Pulse) is the electromagnetic pulse generated by lightning strikes. It can induce surges and currents in wiring and devices, damaging radar, GPS and control units even if there are no obvious external signs.
What is the best approach: attract the discharge or reduce the probability of impact?
On modern boats equipped with electronic devices and composite components, reducing the likelihood of impact is often the most effective approach: it prevents structural damage and indirect effects (LEMP and power surges) that an “attractive” system can still trigger.
Sailing yachts and motor boats: does the mast versus roll bar make a difference?
Yes, the geometry and exposed points change. On a sailing boat, the mast is often the highest point; on motorboats, it can be the roll bar, hard top or antenna structures. In both cases, with carbon components and a lot of electronics, the priority remains to reduce the risk of electrocution and protect the on-board systems.
