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06 November 2013, 00:00
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#1
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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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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RYA Training Courses & Safety Equipment Sales
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06 November 2013, 00:02
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#2
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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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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RYA Training Courses & Safety Equipment Sales
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06 November 2013, 10:25
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#3
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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I'd rather do something illegal to save my life than stay legal and die
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06 November 2013, 14:16
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#4
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Member
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 610
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Quote:
Originally Posted by biffer
I'd rather do something illegal to save my life than stay legal and die
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They would have to come and get you before they could prosecute!!!!!!
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06 November 2013, 14:23
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#5
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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Quote:
Originally Posted by Wightdiver
They would have to come and get you before they could prosecute!!!!!!
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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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06 November 2013, 16:17
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#6
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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Greatland only waterproof to 24 m, do they do ones that diver can use
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06 November 2013, 16:30
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#7
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Member
Country: UK - Scotland
Town: Central Belt of Scotland
Boat name: Puddleduck III
Make: Bombard
Length: 5m +
Engine: 50 HP
Join Date: Mar 2009
Posts: 2,066
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Quote:
Originally Posted by biffer
Greatland only waterproof to 24 m, do they do ones that diver can use
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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.
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RYA Training Courses & Safety Equipment Sales
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06 November 2013, 16:32
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#8
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Member
Country: UK - England
Town: Fareham
Boat name: Red Dog
Make: Porters Renegade
Length: 6m +
Engine: 150 HP Yamaha
Join Date: May 2010
Posts: 610
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Quote:
Originally Posted by SPR
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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40-50m for sports divers, trimix divers can reach 100m and beyond.
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06 November 2013, 16:43
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#9
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Member
Country: Ireland
Town: Castlebar
Boat name: Clewless
Make: Valiant DR 490
Length: 4m +
Engine: 60 hp ETEC
MMSI: Awaitng one
Join Date: Oct 2007
Posts: 1,339
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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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06 November 2013, 16:52
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#10
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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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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06 November 2013, 16:52
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#11
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Member
Country: UK - England
Town: Dorset & Hants
Boat name: Streaker/Orange
Make: Avon/Ribcraft
Length: 4m +
Engine: 50Yam/25 Mariner
Join Date: Apr 2007
Posts: 5,551
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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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06 November 2013, 17:20
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#12
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Member
Country: UK - England
Boat name: ShaarkBait
Make: Zodiac 3.6 FR
Length: 3m +
Engine: Mariner 9.9 4-stroke
Join Date: Nov 2012
Posts: 364
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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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06 November 2013, 18:03
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#13
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,166
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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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Rule#4: Don't feed the troll
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06 November 2013, 18:27
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#14
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RIBnet admin team
Country: Ireland
Length: 4m +
Join Date: Feb 2008
Posts: 14,898
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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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06 November 2013, 18:31
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#15
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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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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06 November 2013, 18:43
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#16
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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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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06 November 2013, 18:54
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#17
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Member
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 12,166
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Quote:
Originally Posted by biffer
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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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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Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: Don't feed the troll
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06 November 2013, 19:15
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#18
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Member
Country: UK - England
Town: Sidmouth
Boat name: Various
Make: Avon, Ribcraft
Length: 4m +
Engine: Mercury 40, Honda 50
Join Date: Nov 2012
Posts: 266
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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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06 November 2013, 19:29
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#19
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Member
Country: UK - England
Town: swanwick/hamble
Boat name: stormchaser
Make: custom rib
Length: 8m +
Engine: inboard/diesel
Join Date: Aug 2007
Posts: 3,848
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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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07 November 2013, 00:39
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#20
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Quote:
Originally Posted by biffer
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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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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