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    deep wrecks and technical dives in Portugal

    anybody knows where could be a good area to organize a potential trip to Portugal with some deep dives in reach? experienced group looking for wrecks down to 100m. i found Algarve but all the infos are about shallow wrecks around 30m. thanks :)
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    Trihunter 6000 helium analyzer: how it works?

    Thank you very much to everybody! Really interesting and clarifying.
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    Trihunter 6000 helium analyzer: how it works?

    Actually i always add helium first in partial pressure blending. And that’s also what most of the blending app suggests for what i know. Some you choose, ok. Thanks for the explaination anyway. :)
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    Trihunter 6000 helium analyzer: how it works?

    In our case i’m pretty sure that is injecting the helium first, because today, blending a 17/45 the first sensor read something around 9 and the second one around 17. So the amount of helium is calculated, based on the oxygen variation after the injection... correct?
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    Trihunter 6000 helium analyzer: how it works?

    hi everybody! I’d like to learn more about the system used to get the helium percentage using just 2 oxygen sensors and no helium analyzers at all, in this mixing stick i’m using at the moment for the blending. I couldn’t find much on their website... Anybody can give me a full explaination...
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    Donating the "primary" regulator

    ok, let's understand each other. me personally, i think the best solution is to provide what the OOAD is looking for, as fast as possible... and then keeping it at a decent distance for control. 2 regs, long hose for the one we donate. good. the rescue course teached us that the rule is to help...
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    Donating the "primary" regulator

    so we teach, or learn as students, an important lesson... just to do completely the opposite? maybe on a dive pro level i could understand... we have a different risk awareness, perception, speed in reacting to the situations and control of gear and people... and still there's no teaching on...
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    Donating the "primary" regulator

    sorry if i'm posting on an old thread... just read almost everything in here 'cause interested in the topic, but about a different detail. first things first: what about that in the SSI instructor manual the donation of the primary is specified as "preferred", but is supposed to be teached along...
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