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Best signalling equipment from the searchers point of view

Discussion in 'General Scuba Equipment Discussions' started by Navy OnStar, Dec 1, 2007.

  1. Navy OnStar

    Navy OnStar Angel Fish

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    No problem. I may not have the SCUBA experience but at least I can help out with what I do have experience in.
     
  2. vladimir

    vladimir Solo Diver

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  3. Navy OnStar

    Navy OnStar Angel Fish

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    Along the same lines as the space blanket. Would defnietly help. Look in the "What they Say" section at the pictures in the water. I may still use the Space blanket though.
     
  4. Web Monkey

    Web Monkey Omniheurist ScubaBoard Supporter

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    Is there anything radar reflective (some kind of reflector patch?) that could be attached to an SMB?


    Terry
     
  5. Jim Ernst

    Jim Ernst Instructor, Scuba

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    Please forgive me for being ignorant guy's!

    What IS radar reflective ? what does it mean Please.:)
     
  6. Navy OnStar

    Navy OnStar Angel Fish

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    Radar reflective is the ability to return a radar signal to the source.

    Metal is usually the most radar reflective material. Think of it as how much of the signal hits the surface and is bounced back to the transmitter/receiver.

    The opposite of stealth.

    Let me know if this doesn't answer you question.

    OnStar
     
  7. dumpsterDiver

    dumpsterDiver Banned

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    This is an interesting topic because it is my understanding that often the Coast Guard will discontinue active aerial search for lost divers during the night time. To me, this seems like the absolute best time to be searching for a diver who has a strong dive light that he can shine towardan aircraft (or the strobe might be nice too). Of course this assumes reasonably clear atmospheric conditions, but thunderstorms etc would also hamper visual searches in the day.

    Does anyone know what the official USCG policy is with reagrd to night search for lost divers? If I am correct that they shut everything down and start again in the morning, is their a way to communicate that the diver definitely had a dive light and try to get them to work the night shift. It seems that they treat a lost diver as similar to a boater who has fallen over board, when a diver could/should have some very useful safety and signaling gear.
     
  8. Navy OnStar

    Navy OnStar Angel Fish

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    I don't know what the USCG policy is but I have never stopped a search due to night. I actually prefer to search at night. Every launch I have made at night has been sucessful (knock on wood) while using NVG's. Before NVG's became mainstream I could see the search possible being called, so it might have been an old policy. I'll ask at work on Monday if I see any of my USCG bretheren around.

    OnStar
     
  9. bleeb

    bleeb Photographer

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    Just to throw another idea in the air: I vaguely remember seeing a product announcement a while back (in a non-diving context) about an inflatable radar corner reflector. Corner reflectors have the useful property that unlike a simple mirror, most of what hits it goes straight back toward the source, which can make you much more noticeable to things like radar, provided your reflector is designed to work at the radar's frequency. Anyone know what frequencies search-and-rescue helicopters use for sea-search radar (determines among other things the minimum size of the reflector)? For that matter, anyone out there knowledgeable enough about radar to guess whether aluminised plastic (i.e. in the corner reflector) would reflect enough energy to be useful? I don't know whether a few square inches of space blanket would return enough signal, either. (Think of a crinkly mirror. Some of the searchlight gets reflected back to the sender, but is it enough to be noticeable?) More reflective than a dolphin, but a dolphin is quite a bit bigger.

    Might be a dive safety product there for some enterprising soul.
     
  10. Jim Ernst

    Jim Ernst Instructor, Scuba

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    Location: Sacramento CA
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    Thank you very much, That clears that up for me!!
     

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