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Old 05 November 2013, 19:00   #1
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Press Release(s): Green Laser leads to Rescue of Diver

FOR IMMEDIATE RELEASE

Green laser leads to rescue of Oahu diver lost at sea

Willow, Alaska – November 5, 2013:

Hawaii News Now aired a story Nov. 2, 2013 about an experienced diver using a green laser to signal for help from the US Coast Guard after drifting at sea for eight hours. Green laser leads to rescue of Oahu diver lost at sea - Hawaii News Now - KGMB and KHNL

The story notes that while the laser was probably not one that was legal to shine at an aircraft, they were able to quickly find him because “he had some kind of a signaling device.”

Greatland Laser’s products are specifically designed to legally signal rescuers in an emergency by creating a line of light. Point the cigar size Rescue Laser Flare® at a wall and you see a line a foot or so long. Point and slowly sweep it toward a passing ship, airplane or other rescue vessel ten miles away and the line is 3,600 ft high. The line cannot miss anything in its path—any portion of the line viewed by rescuers appears as a brilliant flash distinctly different from other background light.

Best of all, Rescue Lasers last for hours on replaceable batteries, are safe for the environment, and there is no fire hazard.

US federal law HR658, Section 311 specifically exempts "an individual using a laser emergency signaling devices to send an emergency distress signal" from the prohibition on shining a laser at an aircraft. Greatland Laser has sold its patented laser emergency signaling devices throughout the world for over 11 years. We have never had a safety issue with the products.

Coincidentally, Greatland Laser received notification this month that it won Ocean Navigator magazine’s 2013 Chuck Husick Marine Technology Award for its Green Rescue Laser Flare® signaling device. The annual award recognizes great technology products used in the marine environment.

Rescue Laser Flares® are Class III A laser < 5mW
Available in green or red
Laser Flares - Rescue Laser - LED Safety Lights
Rescue Flares & Lights - Scotland - UK - Fife - Glasgow - Dundee
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Old 05 November 2013, 19:02   #2
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Greatland Laser’s Green Rescue Laser Flare® Receives Ocean Navigator’s 2013 Chuck Husick Marine Technology Award

Willow, Alaska – November 5, 2013:

Greatland Laser has received Ocean Navigator magazine’s 2013 Chuck Husick Marine Technology Award for its Green Rescue Laser Flare® signaling device. The annual award recognizes great technology products used in the marine environment.

The Rescue Laser concept, simply put, is to send a conventional laser beam through a special optic to create a line of light. Point the cigar size Rescue Laser Flare® at a wall and you see a line a foot or so long. Point and slowly sweep it toward a passing ship, airplane or other rescue vessel ten miles away and the line is 3,600 ft high. The line cannot miss anything in its path—any portion of the line viewed by rescuers appears as a brilliant flash distinctly different from other background light.

The Rescue Laser Flare® can also be used as a tool to detect reflective material on life jackets, channel markers, etc. up to a mile away. When any portion of the laser line is scanned over reflective material it produces a bright flash of light.

Unlike conventional pyrotechnic flares, Rescue Laser Flares® last for hours on replaceable batteries, are safe for the environment, and there is no fire hazard.

US federal law HR658, Section 311 specifically exempts "an individual using a laser emergency signaling devices to send an emergency distress signal" from the prohibition on shining a laser at an aircraft. Greatland Laser has sold its patented laser emergency signaling devices throughout the world for over 11 years. We have never had a safety issue with the products.

Class III A laser < 5mW. Available in green or red laser.

Home - RYA Training Courses - Laser Flares or Rescue Flares & Lights - Scotland - UK - Fife - Glasgow - Dundee
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Old 06 November 2013, 05:25   #3
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I'd rather do something illegal to save my life than stay legal and die
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Old 06 November 2013, 09:16   #4
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I'd rather do something illegal to save my life than stay legal and die
They would have to come and get you before they could prosecute!!!!!!
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Old 06 November 2013, 09:23   #5
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They would have to come and get you before they could prosecute!!!!!!
The point is if you are going to buy something, buy the correct bit if kit.

High powered Laser pointers are dangerous and can cause eye damage - I take both your points but one should not be encouraging breaking the law...

Greatland a Rescue Lasers are designed for the Job.

S.
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Old 06 November 2013, 11:17   #6
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Greatland only waterproof to 24 m, do they do ones that diver can use
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Old 06 November 2013, 11:30   #7
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Greatland only waterproof to 24 m, do they do ones that diver can use

this is what they claim to be the case!

I been told they survive deeper and especially if you silicone grease the threads and place in a zip lock bag. I am not diver and not suggestion doing above

I will ask manufacturer if they can increase there claim .

What depth do normal divers dive too? I am not a diver?

S.
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Old 06 November 2013, 11:32   #8
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this is what they claim to be the case!

I been told they survive deeper and especially if you silicone grease the threads and place in a zip lock bag. I am not diver and not suggestion doing above

I will ask manufacturer if they can increase there claim .

What depth do normal divers dive too? I am not a diver?

S.
40-50m for sports divers, trimix divers can reach 100m and beyond.
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Old 06 November 2013, 11:43   #9
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While some divers dive to 40-50m I think that you will find that most limit their dives to 30 m or atleast that is the case in the west of Ireland

TSM
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Old 06 November 2013, 11:52   #10
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I would say that the lasers need to be waterproof to at least 50 m. Shouldn't be to hard they can do it with torches
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Old 06 November 2013, 11:52   #11
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Also worth considering what other options divers have to take down with them ?

Ie what depth can you take a pyro flare to ( without it being in some from of cannister) ?

My ( limited) understanding is that if you're at 50+m you really do need to know what your doing.......

If this guy was 'found' with a laser that didn't exhibit the same optics/ line of light/ safety the greatland flares are designed to emit then it can only be a plus for the greatland ones.
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Old 06 November 2013, 12:20   #12
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Many items specify depth 'tested' in still water. When moving around, the pressure will be higher.

I was once told that a 35m dive (which I only did once for PADI assessment) needed equipment rated at 200m and that a watch rated for 50m when diving would have leaked long before 50m was reached.
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Old 06 November 2013, 13:03   #13
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I have one of Scots (SPR) green lasers, nice bit of kit it is too, I can't see it being a big problem to knock up a watertight (200m) canister. The laser is tiny so a canister wouldn't add much bulk or weight. Might be a marketing opportunity there Scot
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Old 06 November 2013, 13:27   #14
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There are canisters on the market that hold a PLB. I think that there's one for the double ended flare too. I think if I was diving, I'd like to have the Greatland in mine above either of the others...
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Old 06 November 2013, 13:31   #15
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Pressure doesn't change when you're moving about. I'll see if I can remember boules law. At 30m the water pressure is 4 time greater than on the service.
We all live for the most part at 1 bar which is 14.8 psi at 30 m it's close to 60 psi. No amount of moving about will change that
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Old 06 November 2013, 13:43   #16
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Sorry it's boyles law. Something to do with partial pressure of gases under pressure and it's different for different gases but that's another lesson
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Old 06 November 2013, 13:54   #17
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Sorry it's boyles law. Something to do with partial pressure of gases under pressure and it's different for different gases but that's another lesson
You're sort of right. The problem arises when, for example you jump off a boat into the water, if the bit of kit that's rated to "x" meters hits the water first, it could be subject to pressures far higher than the static water pressure. A bit like doing a belly flop. Similarly if it gets a knock or a bang whilst underwater, the shock could be greater than its rating.
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Old 06 November 2013, 14:15   #18
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The engineer in me said "static pressure stays constant, but total pressure increases with the square of speed. I wonder what difference it makes..."

At 30m down, at 2mph: 0.2%.
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Old 06 November 2013, 14:29   #19
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You might have to factor in that things are lighter in salt water or is this getting a bit silly and off thread, LOL
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Old 06 November 2013, 19:39   #20
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Pressure doesn't change when you're moving about. I'll see if I can remember boules law. At 30m the water pressure is 4 time greater than on the service.
We all live for the most part at 1 bar which is 14.8 psi at 30 m it's close to 60 psi. No amount of moving about will change that
Actually, it does. When you swing your arm underwater, you encounter resistance. That resistance is an increase in pressure against your arm. The seal in the watch or flashlight or canister experiences the same thing.

jky

Oh, and as an aside, a green laser can be a pretty good surface marker without actually shining it on an aircraft. Swung around in a circle, it would make a pretty obvious focal point for the pilot to home in on.
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