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Nitrox - Is it "worth it"?

Discussion in 'Advanced Scuba Discussions' started by ICatchBadGuys, Nov 5, 2019.

  1. BRT

    BRT Giant Squid

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    3 minutes offgassing on 32% instead of air would make some small difference. When you add that to the fact that you likely will have a lower nitrogen load because of more NDL time available I believe it is worth it. For our type of diving 32% simply makes it so we seldom approach NDL's, while on air we were often pushing them. Add in the "placebo" of feeling better and it is worth it to me.
     
  2. mcohen1021

    mcohen1021 Manta Ray

    # of Dives: 1,000 - 2,499
    Location: Texas
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    Have you looked at the PADI Tables? Up to about 100', you are close to an "A" diver after a 2 hr SI, which is very close to a clean slate.

    Example:
    Dive 1 @100 ft 20 min
    2 hr SI
    Dive 2 @ 100 17 min allowed

    I used nitrox 32 on both liveaboards, and dove with an air computer, making it more conservative. Everywhere else I use regular air 80/20

    Either way on a liveaboard you do a 2 hr SI, max 4 dives a day typically.

    Maybe I've just been at it too long, but I like to do other things than just scuba on my vacations.
     
  3. ICatchBadGuys

    ICatchBadGuys Angel Fish

    # of Dives: 50 - 99
    Location: Utah
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    Seems like sound advice as the main thing we're looking at is longer NDLs and shorter surface intervals with less nitrogen "build up" over multiple, multi-dive days in Bonaire on relatively shallow sites. Since posting the question, and considering all of the excellent advice given here, my wife and I have scheduled a Nitrox class with our LDS and look forward to getting the cert so we can use it to our benefit. Thank you!
     
    eleniel, Lorenzoid and Hoag like this.
  4. ICatchBadGuys

    ICatchBadGuys Angel Fish

    # of Dives: 50 - 99
    Location: Utah
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    I'm estimating we're going to be more in the less than 100' depth range for max time with closer to 45 minute intervals shore diving in Bonaire. Longer interval of course between the morning and afternoon/night dives with lunch in between, etc. We're also likely to do at least 4 dives per day for 6 days. We too like to do other stuff on vacations typically, but this vacation is a "dive vacation" for us. This will be our first trip to Bonaire, and to us the only reason to go to Bonaire is the diving, so we're going to take full advantage. Haha! Thanks for the post!
     
  5. Hoag

    Hoag Loggerhead Turtle

    # of Dives: 200 - 499
    Location: Ontario
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    If nothing else, think of it as the same as insurance. It is better to have it and never need it than to need it and not have it.
     
  6. Lorenzoid

    Lorenzoid idling in neutral buoyancy

    # of Dives: I just don't log dives
    Location: Atlanta, USA
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    That sounds exactly like Bonaire diving. I think you have this one well in hand. Have fun!
     
    eleniel, ICatchBadGuys and Hoag like this.
  7. CaveSloth

    CaveSloth Barracuda

    # of Dives: 50 - 99
    Location: The Deep South
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    A good computer that tracks that kind of thing is key to being able to do repetitive dives safely. Consider also that in addition to nitrogen, you need to also keep track of exposure to oxygen! Not only Maximum Operating Depth but also a daily limit of exposure to certain PPO2 levels. For example, PPO2 1.4 is to be limited to 180 minutes per day. That's only 4, 45 minute dives! A good computer like a Shearwater set to the correct gas mix should account for this. Always sanity check the computer's numbers against some rough manual calculations made in advance and either memorized or written on a slate.

    noaa-tables.jpg
     
    eleniel likes this.
  8. Lorenzoid

    Lorenzoid idling in neutral buoyancy

    # of Dives: I just don't log dives
    Location: Atlanta, USA
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    On EAN 32, the PPO2 is 1.4 at 111 feet. In other words, that's the maximum. It's unlikely you will remain at the maximum depth and thus the maximum PPO2 for the entire duration of each dive. Especially on a place like Bonaire, you might start out at a mere 60-80 feet and then lazily wind your way up the slope to the shore, so diving the kind of schedule the OP mentioned in post #144 won't raise any concerns about oxygen exposure. As has been discussed in a few threads, oxygen exposure may be something to watch out for if doing some aggressive diving on, say, EAN 36. But generally, it's a non-issue for us lazy rec divers, especially in a place like Bonaire where there's plenty of good stuff fairly shallow. Which is why being able to spend more time there, thanks to Nitrox, is a good thing.
     
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  9. ICatchBadGuys

    ICatchBadGuys Angel Fish

    # of Dives: 50 - 99
    Location: Utah
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    eleniel, kelemvor, Hoag and 10 others like this.
  10. chillyinCanada

    chillyinCanada Solo Diver Staff Member

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    Excellent news and a great show of humour. Enjoy your trip!
     
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