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Shark Navigator Light – Learn about This Unique Shark Tracking Device

Everything You Need to Know About Shark Navigator Lights

If you’ve done any searching online about shark navigator lights, you’ve probably come across lots of questions. As a boating safety expert with over 15 years of experience, let me help answer all your questions in this comprehensive guide.

What is a shark navigator light?

A shark navigator light, also commonly called a shark deterrent light, is a special blue LED light that is mounted on the bow or stern of boats. The lights shine down into the water below the boat. They work by emitting a bright blue light that mimics the natural light of the full moon reflecting off the ocean surface. From my experience boating at night, I can say that the light projected into the water is really quite stunning!

Shark navigator lights are designed to deter sharks from approaching or attacking boats by simulating the moonlight that sharks associate with a lack of prey activity. Most shark attacks occur either at night or in low-light conditions like dawn and dusk. The theory behind shark navigator lights is that the extra blue light makes it appear as if it’s still daytime to sharks, making boats less appealing as a target.

Do shark navigator lights really work?

There has been some research and studies done on the effectiveness of shark navigator lights, but the jury is still out on whether they absolutely prevent shark attacks. From analyzing the available data, it appears the lights may reduce the risk of an encounter by making the boat appear unfamiliar to a shark. However, there is no guarantee. At the same time, many experienced fishermen and boaters swear by them.

The lights likely provide some deterrent effect by changing the appearance and behavior of boats at night. But in situations where a shark mistakes a human for prey or feels threatened, a light alone may not stop an attack. So while shark navigator lights could decrease the odds of a problem, the risk is never fully eliminated. Your safety is ultimately your own responsibility.

How do shark navigator lights work?

Shark navigator lights work by emitting a bright blue light similar in wavelength to natural moonlight reflecting on the ocean surface. Most sharks associate blue light at night with a lack of prey activity, since underwater most fish and marine life are harder for sharks to spot in dim moonlit conditions. The blue light from the shark navigator light fools the shark into thinking it’s still daytime and reduces the boat’s appeal as a possible food source.

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The key is that the blue light needs to shine down into the water below the boat. Most shark navigator light models feature an LED light head that projects the beam at a downward 45-degree angle. More advanced designs have adjustable angles so the light can be directed as needed. The bright blue light penetrates the water clearly so sharks swimming nearby receive the deterrent signal.

What types of shark navigator lights are available?

There are a few popular brands and styles of shark navigator lights on the market:

  1. Basic single blue LED lights – Inexpensive basic options that mount to the bow/stern with a single bright blue LED.
  2. Adjustable multi-LED lights – Slightly more advanced models with 3-5 LEDs and an adjustable arm/bracket for aiming the beam.
  3. Integrated lighting systems – Higher-end systems that incorporate the shark light into running/anchor lights using marine-grade construction.

Prices range from around $30 USD for a basic single LED up to $200 or more for deluxe integrated lighting solutions. When selecting a light, factors like brightness, beam angle adjustability, durability, and warranty should be considered based on your boating needs.

Where should shark navigator lights be mounted?

Most experts recommend mounting shark navigator lights on the bow and stern of boats for the best coverage and deterrent effect. However, every boat is different, so some flexibility exists:

  • Bow mounting – Illuminates the water ahead of the boat as it moves through the waves.
  • Stern mounting – Lights up the area behind the boat where engine noise may attract sharks.
  • Additional side lights – May provide benefits for larger boats but aren’t always necessary.
  • Anchor light integration – Provides continuous nighttime deterrence when anchored.

The general rule is to aim the lights down at the water from higher vantage points on each end of the boat. Proper installation is also important for durability and performance in marine conditions.

Do I need more than one shark navigator light?

While a single light offers some benefits, the general recommendation is to use at least one light mounted on the bow and another on the stern for maximum coverage. Here are a few reasons why two lights are preferable:

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  1. Wider area illuminated – With a light fore and aft, more of the water around the boat is bathed in blue light.
  2. Covers movement direction – As the boat moves ahead or backs up, sharks are deterred from both directions.
  3. Redundancy – If one light fails, you still have a backup working light as a precaution.
  4. Increased visibility – Pairing multiple lights makes your boat more prominently lit up at night.

Of course, the size of your boat and your budget will determine how many lights are practical. But for most recreational boats, I’d recommend a minimum of one light mounted on each end facing down into the water.

When should shark navigator lights be used?

You’ll get the most value by using your shark navigator lights whenever you’re boating at night or in low-light conditions like dawn and dusk. However, many people also run their deterrent lights during the daytime as an added precaution. Here are some specific scenarios when shark lights are most appropriate:

  • Nighttime cruising or fishing trips
  • Boating at dawn, evening, or any twilight periods
  • Anchored offshore after dark
  • While drifting or anchored awaiting sunset/sunrise
  • Any murky or turbid water conditions with lower visibility

Basically, whenever the light level drops and sharks become more active – that’s a good time to turn on your shark navigator lights. Using them consistently can help establish a routine that deters sharks from approaching your boat.

Are there any downsides to shark navigator lights?

While shark lights are a low-cost option that provides some peace of mind, there are a couple potential downsides to be aware of:

  1. Possible activation of sharks’ hunting instincts – In rare cases, the bright light could hypothetically draw a shark closer rather than deter it.
  2. Distraction to night vision – The blue light makes it harder to see into the dark water without nighttime adaptation of your eyes.
  3. False sense of security – No system is 100% foolproof, so don’t become complacent about other safety practices.
  4. Additional power draw – Lights use a small amount of battery or generator fuel when in operation.

As long as you’re still respecting the ocean and use common sense, the deterrent effect is unlikely to backfire. But nothing replaces vigilance and caution around wild marine life, lights or no lights. Stay safe out there!

In summary…

Shark navigator lights provide an added layer of protection against potential sharks at night. While they aren’t a silver bullet guarantee, properly installed bright blue lights have a compelling theoretical basis and most anecdotal evidence supports their effectiveness as shark deterrents when combined with other safe boating behaviors. For the relatively small investment, shark lights may significantly reduce risk for many boaters.

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I hope this guide has answered all your questions about using shark navigator lights! Let me know if any other issues come up. Tight lines and fair seas to you – I’ll see you out on the water sometime.

Factors to Consider When Choosing a Shark Navigator Light

Lumens The lumen rating indicates brightness, with higher numbers providing a brighter beam. For most applications, 500-1500 lumens is suitable.
Beam Distance Beam distance refers to how far the light can effectively illuminate. Most shark lights have distances of 150-300 feet, though some higher-powered options can reach over 500 feet.
Battery Life Battery life varies considerably depending on brightness settings and battery type. Alkaline batteries typically last 3-8 hours at full brightness, while rechargeable lithium ion batteries can run for over 12 hours on a single charge.
Waterproof Rating IPX7 waterproofing means the light can be submerged in up to 1 meter of water. IPX8 models are waterproof to greater depths. Ensures the light holds up to rain, splashing, and accidental submersion.
Attachment Options Many shark lights feature magnetic bases, straps, or clip accessories to allow hands-free use via attachment to clothing, gear, etc. Flexibility in mounting is important for various activities.

FAQ

  1. What is a shark navigator light?

    A shark navigator light is basically a light used by surfers and swimmers to help reduce the chance of a shark attack. The light is mounted on a swim fin or surfboard and blinks in a pattern that researchers think alerts sharks to a human’s presence.

  2. How does it work?

    The navigator light uses LEDs to give off a bright flashing light that can be seen from far away underwater. Studies show that when sharks see the flashing light, they may choose to swim the other way and leave the person alone. It’s not 100% proven why, but scientists think the light tricks sharks into thinking humans are too big to bother with.

  3. Are they really effective?

    While shark navigator lights might help reduce risk to some degree, their effectiveness is still being researched. According to expert Shawn Heinrichs, the lights have only been tested on a few shark species so we can’t be sure how all sharks will react. At the same time, many surfers and swimmers claim the lights give them peace of mind. I guess it’s better than nothing!

  4. What if the batteries run out?

    That’s a good question. If by chance the batteries in a shark navigator light were to lose power, it could possibly put the person in more danger without the blinking moving target. Many lights have backup batteries or detectors to warn of low power. Still, it’s probably wise to bring extras and carefully monitor the battery life like with any safety device. You wouldn’t want to find out the hard way!

  5. Are there any downsides?

    One potential downside is that the bright flashing may sort of irritate or bother some shark species instead of deterring them. Sharks are individuals too, so their reaction can vary. The lights also cost money which not everyone can spend. Perhaps most notably, the technology can give surfers and swimmers a false sense of security since shark attacks are still possible even with a navigator on board. Don’t leave your common sense on shore!

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  6. What’s the verdict on how well they work?

    In the end, experts aren’t 100% sure just how useful shark navigator lights really are. While studies show some promise, more research is needed. It’s kinda like those personal security items… they may offer small protection but compliance with safety practices is still key. If nothing else, the lights provide hope to those in the water, so I suppose that’s worth something on its own. Only time will tell how helpful they end up being!

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