Helena Frye
Lightning striking a boat is a rare occurrence, with odds of about one in 1,000 per year, but it can cause significant damage. Fiberglass boats are not conductive, so when lightning strikes, it can blow holes in the fiberglass as it tries to find a path to the water. The electric system of the boat may also try to conduct the voltage, frying wires, damaging devices, and melting insulators. In addition, lightning can strike and damage the boat's masts, antennas, and other equipment, leaving a large amount of evidence of the strike.
| Characteristics | Values |
|---|---|
| Chances of a fiberglass boat being struck by lightning | 1 in 1,000 in any year |
| Location | The odds vary depending on the location, with lightning strikes more likely in the Caribbean than in Kansas. 33% of all lightning claims are from Florida, and 29% are from the Chesapeake Bay. |
| Damage to the boat | The lightning strike can blow holes in the fiberglass and cause damage to the electrical system, wires, devices, and insulators. |
| Damage to electronics | Lightning strikes can damage battery selector switches, power panel breakers, volt/amp meters, alternators, cabin lights, and other electrical equipment. |
| Safety precautions | Avoid boating during thunderstorms. If caught in a storm, keep your shoes on and hold on to something non-metallic. Steer the boat with a non-conductive material. |
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What You'll Learn
The odds of a lightning strike are low but vary by location
In the United States, about 40 million lightning strikes hit the ground each year. The Southeastern states are most at risk, with lightning generally decreasing from the southeast to the northwest. However, there are exceptions, such as the Rocky Mountains, where thunderstorms are common during the summer. Florida has the highest number of lightning strikes and lightning-related deaths, followed by Texas, Colorado, North Carolina, Alabama, Arizona, Georgia, Missouri, New Jersey, and Pennsylvania.
The odds of a boat being struck by lightning also depend on its location. For example, a boat in the Caribbean is much more likely to be struck by lightning than one in Kansas. Similarly, within the United States, Florida has the highest odds of a boat being struck by lightning, with 33% of all lightning claims originating from the state. The Chesapeake Bay is the second most struck area, with 29% of claims.
The type of boat also plays a role in the likelihood of a lightning strike. Sailboats with masts, for instance, are more likely to be struck than smaller fiberglass boats that sit low to the water. Fiberglass is not a conductive material, so it may offer some protection against lightning strikes. However, if you are holding something wet or that is in contact with the water, you can still get shocked.
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A lightning strike will blow holes in the fiberglass
A lightning strike can indeed blow holes in a fiberglass boat. Fiberglass is not a conductive material, unlike other materials used in boats. This means that lightning will pass through it with relative ease, potentially blowing holes in the process.
In one instance, lightning traveled down a mast and through a disconnected VHF coaxial cable that was resting against the hull inside the boat. When the lightning exited the cable, it had no easy way to get to the water. After traveling a quarter of a mile through the air, it blew a three-inch hole in the fiberglass hull. Fortunately, the hole was above the waterline, and the boat was saved from sinking.
In another case, a lightning strike on a fiberglass VHF antenna resulted in a similar outcome. The antenna was blown to pieces, and the lightning then traveled through the hull, blowing a hole in it.
It is important to note that while fiberglass boats are less conductive than metal boats, they can still be struck by lightning. The lightning will seek the path of least resistance to the ground, typically the water around and under the boat. If it encounters fiberglass on its path, it can blow holes through it.
To mitigate the potential damage, it is recommended to provide a low-resistance path for the lightning to reach the water. However, if this is not done correctly, the damage can be even worse.
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The electric system will try to conduct the voltage
When lightning strikes a fiberglass boat, the electric system will try to conduct the voltage. This can cause extensive damage to the electrical system and connected devices. The voltage will fry wires, damage devices, and melt insulators. The damage caused by the lightning strike can be severe and lead to costly and time-consuming repairs.
In the case of a lightning strike, the electrical system of a fiberglass boat can be severely affected. The high voltage of the lightning bolt can travel through the electrical wires, causing them to fry and burn. This can lead to short circuits and damage to connected devices, such as radios, stereos, GPS systems, and other electrical equipment. The insulators in the electrical system may also melt due to the intense heat generated by the lightning.
The impact of the voltage on the electrical system can be so significant that it may result in the boat's electronics malfunctioning or becoming completely inoperable. This can include battery selector switches, power panel breakers, volt/amp meters, alternators, and even cabin lights. Repairs to the electrical system can be challenging and time-consuming, requiring specialized knowledge and equipment.
Additionally, the voltage from the lightning strike can also affect the boat's electronic engine controls, compass readings, and other navigation systems. This can cause further complications and impact the safety of the boat. It is important for boat owners to have their electrical systems inspected and repaired by qualified professionals to ensure the safety and functionality of their vessel.
To mitigate the impact of a lightning strike, some boats are equipped with lightning protection systems. These systems provide a low-resistance path for the lightning to reach the water, reducing the potential damage to the boat's electrical system and structure. However, as lightning is unpredictable, even boats with protection systems can still be struck and sustain damage.
Overall, when lightning strikes a fiberglass boat, the electric system's attempt to conduct the voltage can result in widespread damage. The high voltage of the lightning can fry wires, damage devices, and melt insulators, leading to costly and time-consuming repairs. It is important for boat owners to prioritize lightning protection and be prepared to take swift action in the event of a strike to minimize potential hazards.
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The strike will cause damage to the electrical system
The electrical system of a boat is vulnerable to damage when lightning strikes. The voltage of the lightning strike will be conducted by the electrical system, causing extensive damage to wires, devices, and insulators. This can result in a range of issues, from fried electronics to damaged devices and melted insulators. The electrical damage can be long-lasting, with boat owners reporting ongoing electrical problems for months after a lightning strike.
The impact of a lightning strike on a boat's electrical system can vary depending on the path the lightning takes. In some cases, the lightning may travel through the boat's mast or antenna, potentially damaging anything in its path, including electrical components such as wind instruments, TV antennas, radar, lights, and radios.
Additionally, the lightning strike can also travel through the boat's grounding wires, which are connected to various electrical systems within the boat. This can result in damage to a range of electrical equipment, such as bilge pumps, livewell pumps, radios, stereos, and GPS devices. The damage caused by the lightning strike can be significant, and in some cases, may even result in a fire.
The damage to the electrical system can also depend on the type of boat and its construction. For example, fiberglass boats are less conductive than steel boats, and the lightning may find it easier to pass through a steel boat's hull than that of a fiberglass boat. However, even in fiberglass boats, the lightning can blow holes in the hull or cause other types of damage as it exits.
It is important to note that, while damage to the electrical system is a significant concern, the primary focus after a lightning strike should be on the safety of the boat's occupants. In the event of a lightning strike, it is crucial to seek medical attention for anyone affected and to ensure that the boat is in a safe condition before attempting to assess or repair any electrical damage.
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A lightning strike can be mitigated but not prevented
A lightning strike on a boat is a rare occurrence, but the odds vary depending on location. For instance, the odds of a boat being struck by lightning in any year are about 1.2 in 1000, but in Florida, 33% of all lightning claims originate from the state.
While it is rare, a lightning strike can be extremely dangerous and cause extensive damage to a boat and its electrical systems. The strike will usually hit the tallest point on the boat, such as the mast or antenna, and then try to find its way to the ground, typically the water around and under the boat. If it does not have a path to the ground, it will make one, blowing holes in the fiberglass or taking its path through the grounding wires and electrical systems.
Fiberglass is not a conductive material, unlike what other boats are made of. However, if you are holding something that is wet, you can get the strike. Steering the boat with something that is non-conductive will safely keep you in control of the boat.
If your boat is struck by lightning, the first thing you should do is call your insurance company and get your boat hauled as quickly as possible for a hull assessment.
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Frequently asked questions
The odds of a boat being struck by lightning in any year are about 1.2 in 1000. However, the odds vary depending on location. For instance, 33% of all lightning claims are from Florida, while the Chesapeake Bay is the second most struck area in the US.
Lightning tends to leave a large amount of evidence in its wake. It usually strikes masts or antennas, blowing them into pieces. It can also blow holes in the fiberglass and fry the electrical system, damaging devices and wires.
The first thing you should do is call your insurance company and get your boat hauled for a quick hull assessment.
