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Extreme Green Laser Shark Deterrent

Those of you who have attended the DEMA scuba conventions

the past few years have seen small laser pointers for sale. They

were toys compared to this baby.

See below about Deterring sharks.

Sea Turtle Scuba, Inc. is known for producing only cutting edge products for serious SCUBA divers. That's what

we've done with this laser. It's the only one like it on the market.

This is our new, 2007 model, ugraded to use 2 - 1.5V AA batteries. You can put in the standard pen light batteries or use any of the standard rechargeables. It is 7.5 inches long, only 1.5 inches longer than our previous model.

The underwater laser pointers that have been available up to now have been the RED lasers. We offer them from time to time.

But green lasers are powerful. They are so powerful that there has already been people arrested and prosecuted

for shining them at airliners and ruining the vision of the pilots.

I tested one of our first prototypes and saw the beam hit a telephone pole 1/2 mile away.

If you are an instructor wanting to point out fire coral or a stone fish or an octopus to your class, you need a laser

pointer that they can see underwater even in daylight. This will do it. It not only puts a brilliant green spot on your point of aim, but the actual beam is visible so your students can easily follow your point to the object.

This powerhouse is packed into a 7.5 inch mil-spec heavy duty aluminum case with double O-ring seals to keep it safe.

We have set the power level just below the point where you would need a special license to purchase and use it.

It is also set low enough so as not to injure the sharks.

Order a sample of the Extreme Green Laser.

Sample price = $124.95

Inquire before ordering for shipment to addresses outside the USA.

Here's why this makes all those red lasers seem like toys.

1. To start with, this is an infinitely more powerful beam.

2. Ask your instructor what color light disappears first under water.

It's red.

3. Ask your instructor what color lights are most easily transmitted under water.

It's blue and green.

4. Ask your instructor what color light is most easily seen by the human eye.

It's green.

That's why this is the only underwater laser that is worth carrying.

Use it to point out objects underwater that you can't get near or don't want to get near.

Use it to signal to your dive buddy. You only need to shine it on something in front of him.

That green dot lights up like a star on whatever you point it. Even the beam is visible so it is easy for people to find the dot. Just follow the beam.

Shark Deterrent

I'd be pleased to hear from you about this but I don't want to get into an argument about whether it is right or wrong.

I have family members who are animal rights advocates who have already told me that I shouldn't mention this as a potential

use of this Extreme Green Laser. But this Extreme Green Laser is being designed especially to deter sharks without hurting them. We have been gradually reducing the power to find that point where it will chase sharks but not be strong enough to hurt them.

Therefore, I will not tell you that this is a good thing to do. I will only point out some facts about sharks and green lazers,

keeping in mind that sharks can kill you. I have spent many enjoyable hours in the water with sharks and I have also spent some time with them during which I was not certain I was going to make it back alive. I have seen pictures of what sharks have done to people.

1. Sharks have eyes very similar to humans, with rods, cones, cornea, iris, pupil, lens, and retina.

Scientists believe that sharks see color the same way that we do except, being nocturnal, their eyes are 10 times

more light sensative than ours.

2. Sharks have very developed senses for smell and motion and can sense potential prey from miles away.

3. Sharks have very sharp eyesight and use their eyes to home in on their prey from a distance of about 70 to 100 feet away.

4. "It was once thought that great white attacks on the surface were cases of mistaken identity, but researchers now know that this theory is not likely for a few reasons. Reason one is because white sharks have excellent vision and can probably tell the difference between a human on a surfboard, and a seal. The second reason is this; when a white shark attacks a seal it makes one huge bite, and kills the seal on the spot. When humans are attacked the shark usually takes one small bite and swims off. If the shark thought we were seals then it would do to us what it doses to the seals."

5. If a green laser is extremely dangerous to the human eye, and it is the most easily transmitted color laser under water, and the eyes of a shark are 10 times more sensitive to green light than a human, and a shark looks directly at its prey while approaching it from as far away as 100 feet, do you think a shark would continue to approach an object it was investigating

if an Extreme Green Laser was pointed at his eye.

6. Sharks are turned away by electric fields generated by shark protection devices made in Australia because it causes them some discomfort. These devices cost hundreds of dollars and are large and cumbersome. But the shark, like any other animal will avoid discomfort if it is not already fighting or eating.

7. The pain of an Extreme Green Laser should deter any shark from coming too close.

8. Some sharks have second eyelids which they close over their eyes when they are attacking their prey. The great white does not have that but turns its eyes backward during attack. The purpose of this is to protect the eye from getting scratched during the fight. It does not close its eyes while it is approaching, trying to decide if it wants to attack or not.

8. Shark darts that were supposed to inject gas into a shark, or bang sticks that had a shotgun shell or a 45 magnum shell in the end have been used by divers in years past. They are illegal in most places because they are potential weapons, but they had the same drawback. You had to be at most 3 or 4 feet from the shark to use it. And if you did use it, you had a potentially very dangerously injured shark on top of you with your one shot already used.

9. I kind of like the idea of being able to shine a quick laser at a shark that's still 30 or 40 feet distant and turn him away without

permantly injuring him. And, because its a laser beam, you don't have to be a great marksman. You point it at the shark, you see the bright green dot on him, and you just walk the dot over to his eye.

10. So, I am not saying this is a good or noble thing to do. But I am saying that if this had been invented while I was still diving in areas that had dangerous sharks, I would not have gone in the water without one.

Disclaimer: Here's the small print. We don't believe anyone can always always anticipate the actions of wild animals any more than one can anticipate the actions of all people. Therefore, nobody can guarantee what a shark will do every time. The only guaranteed protection against shark attack is to not be in the water with the shark.

Output Power <5 mW (Class IIIa) Warranty 6 Months

Output Type Constant Wavelength 552 mm

Polarization Linear (50:1) Beam Dia. at Source 1.1 mm

Output Variance 10% after 20 min. Beam Divergence 1 mRad

Dimensions 7.5 in x 1 in Switch Twist cap (double O-ring seal)

Operating Lifetime circa 5,000 hrs Batteries 2 - 1.5 V AA supplied

Range 13,000 feet Class IIIa

Waterproof to 300 feet Beam Color Green

Interesting military use of the green laser

The following article is from the Palm Beach Post Newspaper 19 May 2006

We are reprinting it without comment because we do not intend our laser to be used against people.

However, we felt that our customers would want to be aware of the following information.

U.S. troops to use laser technology

Human rights groups oppose the weapons

LOS ANGELES TIMES

BAGHDAD • The U.S. military is deploying a laser device in Iraq

that would temporarily blind drivers who fail to heed warnings at

checkpoints, in an attempt to stem shootings of innocent Iraqis.

The pilot project would equip thousands of M-4 rifles with the

I0 1/2-inch-long weapon, which projects an intense beam of green

light to "dazzle" the vision of oncoming drivers.

"I think this is going to make a huge difference in avoiding these

confrontations," said Lt. Gen. Peter Chiarelli, the commander in

charge of day-to-day operations in Iraq. "I promise you no one —

no one —will be able to ignore it."

But so-called tactical laser devices have been controversial in the past.

A protocol to the Geneva Convention bans the use of lasers that cause

blindness, and human rights groups have protested previous U.S.

attempts to employ such weapons.

The Pentagon has canceled several programs for the stronger

"blinding" lasers, in adherence with the Geneva protocol, according

to the New York-based Human Rights Watch. But the group has said

that even less powerful "dazzling" lasers, similar to the one to be

deployed in Iraq, can cause permanent damage.

The military, however, has apparently decided the risks can be

minimized through proper training, and are worth taking, to help

U.S. troops ward off suicide attacks and to reduce accidental

shootings of Iraqi civilians.

"I have no doubt," Chiarelli said, "that bullets are less safe."

Output Power	<5 mW (Class IIIa)	Warranty	6 Months
Output Type	Constant	Wavelength	552 mm
Polarization	Linear (50:1)	Beam Dia. at Source	1.1 mm
Output Variance	10% after 20 min.	Beam Divergence	1 mRad
Dimensions	7.5 in x 1 in	Switch	Twist cap (double O-ring seal)
Operating Lifetime	circa 5,000 hrs	Batteries	2 - 1.5 V AA supplied
Range	13,000 feet	Class	IIIa
Waterproof to	300 feet	Beam Color	Green