Scuba Dive with Enriched Air Nitrox (What is Maximum PO2? How to calculate Maximum Operating Depth!)
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- Опубліковано 18 чер 2024
- Scuba Dive with Enriched Air Nitrox (What is Maximum PO2? How to calculate Maximum Operating Depth!) On our previous episode, we covered the basics of what Nitrox is and the benefits of diving using enriched air nitrox. This episode Lyell will share with the you the risks of diving with nitrox and how to avoid those risk by knowing the theory behind its use. We will discuss; What is a partial pressure of a gas? What is your maximum partial pressure of oxygen? How do I calculate my Maximum Operating Depth (MOD)? Lastly, Lyell talks about the reason why EVERY diver should become Nitrox certified and how to do it!
0:00 What 3 things must we know to dive safely with Nitrox?
1:07 Welcome to Everything Scuba!
1:44 Dalton's Law
2:38 What is the Maximum Partial Pressure of Oxygen we should dive with.
3:35 Effects of oxygen toxicity!
4:09 Worst case scenario if exceeding 1.9 PO2?!!!
4:43 Dalton's Triangle/Magic Triangle
6:35 Example of using Magic Triangle to calculate Pressure.
7:42 How to calculate Maximum Operating Depth (MOD) from ambient pressure.
8:53 What if we went diving with 100% Oxygen?
10:27 Good news!
11:03 IMPORTANT: Analyze your tank!
11:37 Nitrox App for you phone
12:41 Nitrox and your dive computer.
13:22 Share this with divers taking Nitrox class!
13:49 PADI Nitrox Certification
15:31 Next up....let's build a rebreather!!!
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Thank you !, this is exactly what i needed to refresh my course knowledge !
Thanks. Got it now. I kept hearing these numbers in technical dive videos. New to it, so I'm soaking up information.
I was having trouble with the online course, but you have explained it well, and now it’s starting to click. Thanks!
On of the best classes I have ever taken thanks for all you help.
Very helpful! Going on my first Nitrox trip later this month and this helped reviewing the course.
Thanks Lyell. Awesome explanation.
Thanks for the education. I learn some things from every video which makes me a better and safer diver.
Thank you very much
Great video, very informative and simple
this is an excellent explanation, thanks
Fantastic explanation and easy to understand.
Great video and very well explained. Just enough info to grasp the theory without overloading. Thanks very much, great refresher.
Thank you Jeremy! Glad you got something out of it. Thanks for watching!
This was an awesome video explanation. Used this video in conjunction with my nitrox cert and it really helped break things down. Thank you!
Will thanks for your kind words. We are glad it was of help to you and congratulations on becoming a Nitrox diver!!!
I agree with you brother I recommend it everyone 🙌
Great vid! Thx!
I appreciate this video. Just became nitrox certified
Excellent explanation
This was really well delivered and learned alot, thank you
Thank you David. Glad you found it useful! Thanks for watching and your kind comments.
Have been using Nitrox every week once a week for 6 months. It will be interesting switching back to air at the same operating depth again. I swore I felt better at 20m on EAN32 than air when I first made the switch.
First time watching your vids. Great breakdown. I'm a UK BSAC Dive Leader,. With Nitrox taught in deoth from entry level and sports diver.. Love watching cross diving organisation vids, as each has their own way of teaching. Keep up the great work.
I’m a UK native. Grew up in southern Scotland! Thanks for you kind words! Lyell.
Thanks…….great work👍👍🐙
Great information! Getting certified this weekend and after reading the padi book it makes much more sense now. Thank you
+Drago G glad it helped you out! Our goal is to make learning easier! Thanks for your kind words and thanks for watching! Good luck this weekend. I’m sure you’ll rock the course now!:)
Bravissimo!Grande Video complimenti! 👍👍
Best explanation 👌
Great review and how PO2 is involved in the calculations. Thanks!
Thanks @everything Scuba for a really well put together video. Having not dived Nitrox for a long time, and a friend gaining his qualification this weekend, it made me think about my lack of knowledge and skill fade. From what I remember about the E-Learning, your video taught me more in 15mins than an afternoon watching videos. So thank you.
Andy, we are glad you found the video helpful! Our goal is to make this as simple and as clear as possible while still getting across the necessary knowledge. Thanks for your kind a words and thanks for watching!
Totally agree!!!
Thanks. Thinking about doing nitrox course in a few months.
Great content!
Very nice refresher to shake the cobwebs. Thank you 🙏🏼
This was helpful to review since I haven't used Nitrox for a few years. Good job on making the math easy. ;o)
I Love the additional dive time allowed by the use of Nitrox, Especially the shortened surface intervals when doing multiple dives.
It does make a big difference especially when repetitive diving.
That was impressive
I was always taught CONVENTID - Con = convulsions. Really great video - a good refresher.
Thanks Simon! I know that acronym too! Glad you got some good out of the video. Thanks for your kind words!
Super clear, great math breakdown!
We are glad you got something out of the video! Thank you for your kind words!
THANK YOU SO MUCH
This is very helpful. I am recently certified and need to learn as much as possible. I am a former high school teacher in NYC, I really like your presentation. Keep up the good work.
I’d bet you’re glad your former😂🥳.
Just brilliant!
Thank you Adrian. Glad you enjoyed the video! Thanks for watching!
Always love your upbeat on point discussions 🤙 Cheers, #SeattleRingHunter
awesone video. i understand it more than my nitrox course. 😂
Great content!mThx
Thanks!
Just the review I needed!😊
Always feel better using Nitrox vs. compressed air when diving. Adds additional safety by reducing the surface interval (which is usually defaulted to the air surface interval on most dive boats).
Definitely builds in that additional safety factor especially with short SI's while boat diving! Thanks for your comment Doug and thanks for watching!
Hi, I love your videos. Can you do a video on setting up a scuba twinset, routing etc. Thanks
Thank you David, yes we can do a twinset video with regulator setup and hose routing. Thank you for the idea and the kind words. Josh
great video! can you recommend a nitrox calculator for Android? Thanks so much!
Sir pleas ecplain about this farmula(Ambient pressure-1)×10
And -1 also
What is ambient pressure and why we -1 from ambient pressure in formula..??
Good video.
A while ago, I wrote a spreadsheet that calcs MODs & PO2 for various mixes. Very simple, it's in metric. Free if you want it.
PS. I'm a PADI & BSAC Instructor.
Tony! Would love to have a copy! Thanks so much!
@@everythingscuba Available for download vis this link
1drv.ms/u/s!Ai4VAxQeTPYUi9lhmvn3fSp-zjCeqg?e=xCBok2
It's a MicroSoft OneDRive filestore.
Change the O2% value in D3 to see PO2, EAD & MOD change.
I made the spreadsheet over 20 yrs ag! I have regenerated so it will load with newer versions of Excel.
Great video, thank you. Question… why at 7:19 you called the oxygen “nitrox” when referring to the EAN32?
I believe I referred to it as “32% Nitrox” which means Enriched Air Nitrox I (EANxI) contains 32% Oxygen. Thanks for watching!
@@everythingscuba Thank you very much. Again, amazing video and very valuable information.
I begun feeling dizzy at 25m depth usung Nitrox 32. Im not sure it was the nitrox. I was heading up and got dizzy so head was spinning. Maybe it was vertigo. I was a bit weak at the time so it could be related to that instead.
I have a dumb question. I'm just starting to purchase new equipment, after not diving a long time. When I was diving, we never got into Nitrox, but this time around I will be. Are those large “Nitrox” decals required on tanks that are filled as such? If so, can you use smaller decals or just a green valve cover? See, dumb😂.
🙏
Unrelated topic, I noticed on the whiteboard and on your shirt you have the red with a white diagonal flag. The Van Halen album, diver down.
Is that flag used in Northern America? Is that IALA system B?
I'm used to seeing a white and blue with a white triangle cut out of the blue section. The international Alpha flag.
I'm in Australia and I have never visited Canada or the USA.
The red square with the white diagonal is the flag used in the US and Caribbean for Diver Down. Thanks for watching and thanks for you question!
Thailand use red one as well.
@@pucioy Thanks for letting me know. I'd like to dive in Thailand someday.
Hang on. For daltons first example. You said 32% Nitrogen gas. But in the second example, it changed to 100% O2. Is this just so that you don’t get an undefined answer (#/0) or am I missing something?
Upon further inspection. The nitrox gas name you used, was another way of saying it was in fact 32% oxygen. Cool. Ignore me lol
can you show me how did you derive the 1.4 and 1.6?
www.undercurrent.org/UCnow/dive_magazine/2010/RisksOfOxygen201009.html
As you said, 1.6 is possible for a emergency situation, maybe to save your buddy. But how long is a very short time?
I would guess max one minute, enough to save someone.
I didn't have a nitrox certificate jet, but I guess you would feel more save if you would know, how much is a very short time. I could imagine every one is different. I am not a pro but I would think 50sec to 70sec by 1.6?
+Ben Heckendorn a difficult question to answer. If you have ever taken the Rescue Diver course, one of the first things you learn is to not become a victim yourself. This means if your buddy needed help
and it meant violating your PO2 of 1.6 then you are absolutely putting yourself at risk of becoming a victim. In such a scenario the “Stop-Think-Act” phrase is very apt. Can you accomplish a rescue without significant risk to yourself? How quickly could you do it and are you willing to accept that risk? The best way to avoid this is not not even get close to 1.6. I set my computers to warn me when I get within 10 feet of my MOD on any Nitrox mix before I even reach 1.4.
@@everythingscuba well I sadly just stared, since 10-21-21, I'm OWD SSI. But I worked for nearly 8 years as volunteer firefighter, so I know you should never push yourself in danger. But I couldn't leave my buddy at 50 meters, if I was near to save him/her. I know I would risk my own health, but if I know I got around a minute by 1.6 I would know, I could help in such a situation. Sure you should already give your buddy a sign to come back much earlier. But even then, emergency could happen every time.
@@benheckendorn2696 congratulations on your recent certification! And I know what you mean that leaving someone in that situation would be a very difficult decision. I recommend you get a bunch of dives under your belt and gain some experience and pursue rescue diver and your Nitrox certifications. Thanks for your great questions and thanks for watching!
@@everythingscuba thank you so much! I will do the nitrox certificate, well I couldn't give up a buddy or anyone in danger, sure I hope such would never happen, but if. I guess I would give myself max 70 sec. so if I could save, great, if not I had tryed at least. 😔
I know it is always difficult, to save someone you should put you a bit in danger, but the line between danger and deadly danger.
So I got a high respect from all who work in rescue? Because they push themselfes always at limits.
Sure what you do is the best, warning 10m before you reach 1.6 so you always know: I could 10 meter more savely.
Well if I would even guide a dive, I would mix the nitrox for 60 meter when I plan to go to 50m.
I guess others may plan a reserve.
Would be nice to know if they do.
Soooo nitrox has a max depth but is there a limitation on how long you can be at that depth?
Yes. 1. Like any scuba unit you would eventually run out if gas. 2. Nitrox has a decreased amount of nitrogen but eventually you would also reach and pass the non decompression limit. This is why each mix of Nitrox also has its own dive tables.
This and your other nitrox video is what made me want to pursue a nitrox cert and my class is this Wednesday. 🎉 thanks for the inspiration
@@sivonparansunHow much time did the Nitrox class take?
Different agencies and shops do the classes differently. Mine was an evening in the classroom.
Has anyone else commented about the reflections of the ring lights in your glasses?
It's really offputting! 🤔🤨🧐
All of our new videos have different lights.
Nitrox 100% for multiple days of multiple dives a day!
The huge advantage with Nitrox is truly during repetitive dives for sure!
PO2 1.4 ata / FiO2 0.21 = 6.667; MOD is 56.6m; Mathematically one can dive to 56.6m on compress air. Why is it not recommended?
You are correct that air can be used down to around 185 feet or 56 m with a PO2 that remains at 1.4 or less. However, the effects of nitrogen narcosis at that depth would be almost overwhelming for most divers. We also have to take into account the effect that nitrogen would have on your central nervous system and the narcotic effects from that gas could impair your ability to dive that deep. Although it’s not impossible and many divers have been that deep on air, we would certainly not recommend it. Also in terms of recreational divers we limit the recreational depth to a maximum of 140 feet.(42.6 m) this is because beyond that depth you could quickly earn a decompression debt. Increased gas consumption and also nitrogen loading would have a huge impact on your ability to decompress on the way back to the surface, and whether you’d have enough gas to allow this. Therefore as a single tank recreational diver we would never recommend diving beyond 130 feet or over 40 m. I hope this explanation helps? Thanks for watching!
@@everythingscuba Explanation appreciated :)
Or just take a picture of the MOD chart and save it to your phone. No app needed.
Don't dumb it down, Lyell. Diving isn't tennis. 😁
You are correct it isn’t tennis. But if you hit the ball wrong in tennis it doesn’t tend to cause life threatening harm, so we thought we should be thorough on this one. :)
Hm... As far as I know combat divers use (or were using in the past) pure-oxygen rebreathers that allow them to dive up to 14-15 meters. But your calculations set a limit at 6 meters. Why is it so?
+Злой Котан because we are recreational divers. Not combat divers.
voodoo gas...
Bro, take the glasses off or get two side projected lights. This isnt tiktok dances with that goober ring light
Thanks for the tip Bro.
helium oxygen is much safer than nitrox.....just a little expensive....imagine a dive with no deco
A little expensive??
IMO this video is not helpful. Just take a Nitrox certification course. You must test your gas yourself. Trust no one. Do you testing twice with no distractions.
At 13:51, we actually spell out very specifically in this video what is entailed in the certification process and strongly urge our viewers to become certified and we absolutely agree that you should be testing your own cylinders. Not relying on others.
Our guess is that you didn’t get to the end of this video. So your comments are not helpful.
Either stop wearing glasses or sort out your lights. It's a terrible seeing these circles constantly appearing on the lenses of your glasses!
Really? How about you check this stuff before you create a video.
Yup sorry our free video offended you.
the magic triangle has more sides then the magic circle.... and a fun video but the jump around videos are giving me a headache