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Hi from Brisbane Australia

Dave_S

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I'm hoping to find out more about lasers for survival at sea. I started a thread, about Man Overboard, hoping lasers might be a simple addition to being found. It is easy to be 100's of miles from any other person or help, you and the person left on the boat are on your own. It's up to the boat you fell off to find you or you will die. Lasers might just be what makes the difference. Thanks for your help.
 



Encap

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I'm hoping to find out more about lasers for survival at sea. I started a thread, about Man Overboard, hoping lasers might be a simple addition to being found. It is easy to be 100's of miles from any other person or help, you and the person left on the boat are on your own. It's up to the boat you fell off to find you or you will die. Lasers might just be what makes the difference. Thanks for your help.
Best bet is to contact SOS Marine in Sidney NSW and consult with them, experts on proven man overboard and rescue technologies.
Employing a "kings new clothes" laser based on a daydream for the most part that is unproven, untested, uncertified effective for the purpose and/or basically useless in practical application could be a fatal mistake - not to mention, blinding yourself after having fallen overboard with a high output laser could be a coup de grâce ending one's chances of rescue and life, under those circumstances.

There are many different established effective technologies and techniques used for the purpose and no one of them alone fully covers the circumstance of having fallen overboard and being successfully rescued thereafter.
Give SOS Marine, in Sidney, who have 30 years of experience in the practical application actual use of man overboard rescue technologies and equipment a call and ask what best mix is as of November 2019.
Doubt you need to reinvent the wheel and see their web site here: https://www.sosmarine.com/
 
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BowtieGuy

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Welcome to LPF, Dave! :)
Have fun, be safe, and enjoy your stay.

We have many knowledgable members here who can help answer your laser related questions.
 

Encap

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PS Note: the laser flare is not subject to Australia’s ban on importation of laser pointers, because it is not a pointer under that country’s laws.

See: https://www.laserpointersafety.com/rescue.html

PPS
Assume this was not you but... lasers pointers are taken very seriously in Australia, case in point:
"A rescue helicopter in Queensland, Australia was illuminated by laser light six times in a week.
There were two attacks on April 10 2019, two on April 15, one on April 15 and one on April 17.
The Toowoomba LifeFlight Rescue helicopter was flying over the Toowoomba suburb of Glenvale, when the laser light hit the aircraft. There was no indication of any eye effect or injury to the pilots, and no indication of the flight changing or being interrupted.
After the first four events, police put out a “strong media campaign” about the dangers of aiming laser pointers at aircraft.
They also asked the public to report any information they might have.
Interfering with crew or aircraft carries a penalty of up to two years in prison, under the Civil Aviation Act."

If you are intending to cobble together a high output >5mW better check with authorities as to what can fly and how/under what circumstances--what beyond just saying any given laser pointer is a laser for rescue signaling purposes.
What need be done for it not to be classified as a laser pointer?
Fine line between a genuine rescue specific purpose laser pointer and just an ordinary laser pointer which is illegal.
Would guess you would have to jump through a hoop or two to not been seen as simply attempting to circumvent Australian laser laws.
 
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