I never understood why people used END, equivalent narcotic depth instead of partial pressure or crazy factor for nitrogen. Well done by standardizing our measurements with crazy factor.
I'm guessing here but I think its because narcosis is different to everyone so if you turn it into a "what it would be like on air at a certain depth" that allows people to get a feel for what the narcosis would be like on trimix where they intend to go. I like "Crazy factor" because it's a simpler concept to explain and remember and calculate.
Excellent, excellent video, Jonathan. Very well thought out explanation of a complex subject. You would make an excellent instructor. I look forward to your Great Lakes wreck diving videos.
Hello, I am a total fan of your video. I watch it as soon as they come out. Thank you a lot. I am a diver using the metric system and that is why the pressure calculations are simpler than with imperial units: for me 130 feet gives 40m, which is a PN2 of 4 ata (9:26).
Another great video of yours Jonathan. So well explained. Many instructors are far away from proper simple and clear explanation, that makes you wonder even more about the subject. Thank you very much.
Thanks for that explanation of trimix! I've been diving for 40+ years and never knew what it was really. I don't plan to dive it, but am very glad to know about it!
I'm fairly confident that Richard Harris and his team use established habitats as part of their decompression set-ups, they even have a backyard made fan system to move air around the habitats. Fascinating to watch their videos of their dives and deco stops.
Yes, their decompression is so long that they could never do it without a way to get out of the water, which is quite cold in the Pierce Resurgence. Watch this video!!! th-cam.com/video/uJ4ViSqZiJ4/w-d-xo.html
I just saw the poster for Nitrox certification course in nearby divingshop, and you then posted this video introducing trimix…😂😂😂 This makes me feel Like to having a try on different gases. Okay, already wrote down ‘nitrox certification’ in my memo book…
Even though these are subjects that I'm very familiar with it is always good to get another refresher and the way you do it is simply incredible for beginners and experts. keep it up!
Another amazing episode! I really appreciate these kinds of videos. I haven’t reached that level in my training yet but I find this topic extremely interesting and I love learning more. Dr. Simon Mitchell has some incredible talks on these topics as well. I highly recommend his talk about their experiments using hydrogen on deep dives
Jonathan I'm not a diver. This video was very interesting and because of your ability to teach difficult subjects on a level we can all understand, I've been able to learn all about diving, gasses, & safety. You're always entertaining, thanks so much. Happy New Year to you, your family and crew. ❤
out of personal experience? how do you feel with each formula experimented? what do you prefer? transitionally speaking I think it will take time for people to adjust with different formula ratios. long term experience with new adjust must be considered as patient progressive.
One small note: O2 under 18% you will NOT pass out. This is about the % you blow into somebody to rescue him/her with mouth to mouth breathing. With each breath a person uses about 4-6% of the O2 and you can still give mouth-to-mouth breathing, and that person can still use about 4% of it. So i think the amount of % O2 is way lower then 18% before we pass out. At least two breaths, that would be a 9% (or even lower, because it's still higher than the 6% we need). But for safety it's better to use the 18% 🙂 Or am i missing someting? ;-)
Just dove Capote Zenope in January, Was 2 meters below my dive master! My SAC rate is cr@p that at 115 feet I got Narced out of ming. Scared the cr@p out of DM and ran out of air.
Nowadays, it is apparently possible to replace nitrogen with hydrogen :-) I was supposed to visit in the fall, the trip was postponed by a year, in the Deep Hole in Dubai and dive there with Triox, not Trimix. I have diving experience only with Nitrox. Some people love the terms - ha ha ha... I don't think I'll ever breathe hydrogen but it's the next step in current deep diving.
There's a recent presentation by Simon Mitchell on TH-cam. Cool stuff. They mainly experiment with hydrogen because it's the lightest gas to breath. Gasses, when breathed under high pressure, become dense and this makes it hard for your body to breathe. Even trimix with its helium. Hydrogen is even less dense so easier to breath. The main downside is that it's explosive when mixed with oxygen so it should be handled with much care on the surface. Apparently it's safe to breathe if it's mixed with a maximum of 4% oxygen, so very hypoxic and only suitable for very deep dives.
I was at Diving Talks in Portugal when Simon gave this talk. It's fascinating. Talk about a guy who knows how to explain complex in simple terms! th-cam.com/video/skL5EQa8DFY/w-d-xo.html
I am just curious does this only apply with pressure on your body directly, what I mean is in a submarine to they have to breathe a different air mixtures and pause for decompression or does it only apply if the pressure is on your body directly.
Maybe I’m thinking about this wrong… Nitrogen in air at sea level is about .79, and at 130 feet approximately 5 atm. So 5×.79 equals 3.95 or approximately 4. Partial pressure of nitrogen at 130 feet with air is approximately 4. Five is the atmospheres at 130 feet. So you’re crazy factor should be 4???
I have a question is the minimum safe PO2 is 0.16atm then why don't we have problems going higher than 2200m in altitude which is when the PO2 is 0.16atm, instead it isn't until 8000m that we hit the limit which is a PO2 of 0.075atm and people don't just pass out immediately either unlike what is talked about with diving gas mixes. Anyone have an explanation?
Everyone has a different reaction. People who climb mountains at high altitudes spend a lot of time acclimating, which allows their bodies to create more red blood cells.
Heliox (Hydrogen/Oxygen with no Nitrogen) was experimented with back in the day. They figured that by getting rid of ALL the nitrogen, you would get zero chance of narcosis. However, what they found was that you get HPNS. So now all the deep diving gases have at least a small amount of nitrogen which helps calm the HPNS a bit.
I used the END calculator to find the END of 130 feet for each blend, not the actual mathematical PN2. I thought about explaining that, but that's a long story...the math is not really that important. (I figured someone was going to ask about this!) It's just the concept that reducing the nitrogen reduces the "Crazy Factor". If you take the class, they will go into the math a lot more.
What Jonathan didn't make clear is that both Nitrogen and Oxygen contribute to narcosis. You need to add together ppO2 and ppN2 and then the numbers will work
So here's something really interesting about that. Heliox was tested quite a bit and what they found is that a little nit of nitrogen in the mix helps with HPNS, so they always keep just a little nitrogen in there.
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High-level subject matter with a simplified explanation accessible to everyone. Not all teachers posses this skill.
I never understood why people used END, equivalent narcotic depth instead of partial pressure or crazy factor for nitrogen. Well done by standardizing our measurements with crazy factor.
I'm guessing here but I think its because narcosis is different to everyone so if you turn it into a "what it would be like on air at a certain depth" that allows people to get a feel for what the narcosis would be like on trimix where they intend to go. I like "Crazy factor" because it's a simpler concept to explain and remember and calculate.
Thank you Jonathan! You definitely have a wonderful way to express some of the more complex diving things!
Glad you think so!
If Jonathan, Todd, woody and Gus open up a scuba shop and teach diving together, it might be the best experience you can have
Love it! Thank you for explaining all this, Jonathan!
Excellent, excellent video, Jonathan. Very well thought out explanation of a complex subject. You would make an excellent instructor.
I look forward to your Great Lakes wreck diving videos.
Hello, I am a total fan of your video. I watch it as soon as they come out. Thank you a lot. I am a diver using the metric system and that is why the pressure calculations are simpler than with imperial units: for me 130 feet gives 40m, which is a PN2 of 4 ata (9:26).
True, the metric system is way easier to calculate!!! But for whatever dumb reason, the USA never full embraced the metric system.
Another great video of yours Jonathan. So well explained. Many instructors are far away from proper simple and clear explanation, that makes you wonder even more about the subject. Thank you very much.
Thanks for that explanation of trimix! I've been diving for 40+ years and never knew what it was really. I don't plan to dive it, but am very glad to know about it!
I'm fairly confident that Richard Harris and his team use established habitats as part of their decompression set-ups, they even have a backyard made fan system to move air around the habitats. Fascinating to watch their videos of their dives and deco stops.
Yes, their decompression is so long that they could never do it without a way to get out of the water, which is quite cold in the Pierce Resurgence. Watch this video!!! th-cam.com/video/uJ4ViSqZiJ4/w-d-xo.html
Great video Jonathan, I took Advanced Trimix., you nailed it on the head.
It was fun, expensive and a great experience.
I just saw the poster for Nitrox certification course in nearby divingshop, and you then posted this video introducing trimix…😂😂😂
This makes me feel Like to having a try on different gases.
Okay, already wrote down ‘nitrox certification’ in my memo book…
If you want to stay longervon moderate depth or take a diving vacation with multiple dives per day, it‘s worth it.
cool stuff ! never realized what u breathe on diffrent depths , they do sound like dangerous mixes if u have to cater to an unknown dive / exploration
Even though these are subjects that I'm very familiar with it is always good to get another refresher and the way you do it is simply incredible for beginners and experts. keep it up!
Another amazing episode! I really appreciate these kinds of videos. I haven’t reached that level in my training yet but I find this topic extremely interesting and I love learning more. Dr. Simon Mitchell has some incredible talks on these topics as well. I highly recommend his talk about their experiments using hydrogen on deep dives
Jonathan I'm not a diver. This video was very interesting and because of your ability to teach difficult subjects on a level we can all understand, I've been able to learn all about diving, gasses, & safety. You're always entertaining, thanks so much. Happy New Year to you, your family and crew. ❤
It sounds like maybe you should be a diver though!!
@@BlueWorldplus One of my goals for 2024🤙👌
I could sit and listen to you teaching or just giving “information” all day ! 😂
Aw, thanks!!
Awesome video, beautiful explanation, love your humor Jonathan :)
Thanks so much Todd, for the wonderful explanation.
Todd??
@@BlueWorldplus Yes Todd thank you so much.
Great video for a rec diver looking down my monical into the deep end of the sea.
Fascinating! Guess you're gonna wait until you get Hydreliox certified before doing a video on it? 😉
No, I might do a video on that just because it's so amazingly cool!
Bu Simon already did a good one:
th-cam.com/video/skL5EQa8DFY/w-d-xo.html
This was really informative. Thanks
Good one, mate.
Awesome video!!! Thank you.
Great stuff Johnathan, thank you.
Glad you enjoyed it!
Would really appreciate metric next to the imperial :), thanks for the vid!!!
Excellent video!
Thank you!
out of personal experience?
how do you feel with each formula experimented?
what do you prefer?
transitionally speaking I think it will take time for people to adjust with different formula ratios.
long term experience with new adjust must be considered as patient progressive.
Great video
Very interesting stuff! Although i think i'll stick to normal air and depths, perhaps Nitrox some day, good enough for entertainment 🙂
Awesome!
One small note: O2 under 18% you will NOT pass out. This is about the % you blow into somebody to rescue him/her with mouth to mouth breathing.
With each breath a person uses about 4-6% of the O2 and you can still give mouth-to-mouth breathing, and that person can still use about 4% of it.
So i think the amount of % O2 is way lower then 18% before we pass out. At least two breaths, that would be a 9% (or even lower, because it's still higher than the 6% we need). But for safety it's better to use the 18% 🙂
Or am i missing someting? ;-)
You are absolutely right....but training agencies like to be conservative.
Just dove Capote Zenope in January, Was 2 meters below my dive master! My SAC rate is cr@p that at 115 feet I got Narced out of ming. Scared the cr@p out of DM and ran out of air.
Yikes!
@@BlueWorldplus Why we dive with buddys or DM's
And learn from our mistakkes
Is Trimix a delicious but healthy cereal? 🥣
MMMMM good!
Nowadays, it is apparently possible to replace nitrogen with hydrogen :-) I was supposed to visit in the fall, the trip was postponed by a year, in the Deep Hole in Dubai and dive there with Triox, not Trimix. I have diving experience only with Nitrox. Some people love the terms - ha ha ha... I don't think I'll ever breathe hydrogen but it's the next step in current deep diving.
There's a recent presentation by Simon Mitchell on TH-cam. Cool stuff.
They mainly experiment with hydrogen because it's the lightest gas to breath. Gasses, when breathed under high pressure, become dense and this makes it hard for your body to breathe. Even trimix with its helium. Hydrogen is even less dense so easier to breath. The main downside is that it's explosive when mixed with oxygen so it should be handled with much care on the surface. Apparently it's safe to breathe if it's mixed with a maximum of 4% oxygen, so very hypoxic and only suitable for very deep dives.
@@Yggdrasil42yep. YT-channel is Diving Talks. Video: The first deep rebreather dive using hydrogen... and it was not first one.
I was at Diving Talks in Portugal when Simon gave this talk. It's fascinating. Talk about a guy who knows how to explain complex in simple terms!
th-cam.com/video/skL5EQa8DFY/w-d-xo.html
@@BlueWorldplus Wow!
I am just curious does this only apply with pressure on your body directly, what I mean is in a submarine to they have to breathe a different air mixtures and pause for decompression or does it only apply if the pressure is on your body directly.
In a submarine, you are at one atmosphere and you breathe normal air.
That is what I thought but I was not sure, thanks @@BlueWorldplus
Maybe I’m thinking about this wrong… Nitrogen in air at sea level is about .79, and at 130 feet approximately 5 atm. So 5×.79 equals 3.95 or approximately 4.
Partial pressure of nitrogen at 130 feet with air is approximately 4. Five is the atmospheres at 130 feet.
So you’re crazy factor should be 4???
I have a question is the minimum safe PO2 is 0.16atm then why don't we have problems going higher than 2200m in altitude which is when the PO2 is 0.16atm, instead it isn't until 8000m that we hit the limit which is a PO2 of 0.075atm and people don't just pass out immediately either unlike what is talked about with diving gas mixes. Anyone have an explanation?
Everyone has a different reaction. People who climb mountains at high altitudes spend a lot of time acclimating, which allows their bodies to create more red blood cells.
@@BlueWorldplus This wouldn't apply when skiing as it is common to go from under 1000m to up to or over 3000m in a few minutes with the chair lift.
Very good video very well explained..
Thanks!
What about HeliOx? Ive heard about it, but what would be its use case?
Heliox (Hydrogen/Oxygen with no Nitrogen) was experimented with back in the day. They figured that by getting rid of ALL the nitrogen, you would get zero chance of narcosis. However, what they found was that you get HPNS. So now all the deep diving gases have at least a small amount of nitrogen which helps calm the HPNS a bit.
@@BlueWorldplus Ah. Didnt know it was an old school thing. Good to know. Thanks.
I feel stupid…. How do you calculate the “Crazyfactor”? pO2 I understand, but not why PN2 @220 feet with 44% N2 become 5!
I used the END calculator to find the END of 130 feet for each blend, not the actual mathematical PN2. I thought about explaining that, but that's a long story...the math is not really that important. (I figured someone was going to ask about this!) It's just the concept that reducing the nitrogen reduces the "Crazy Factor". If you take the class, they will go into the math a lot more.
What Jonathan didn't make clear is that both Nitrogen and Oxygen contribute to narcosis. You need to add together ppO2 and ppN2 and then the numbers will work
I dive twice a week. Johnathon Bird and Todd are the real deal! Passionate folk!
I wish I dove that much!!
What about Heliox ? No nitrogen
So here's something really interesting about that. Heliox was tested quite a bit and what they found is that a little nit of nitrogen in the mix helps with HPNS, so they always keep just a little nitrogen in there.
13:01 Should have said Nitrogen, not Helium...
Diving for results: shoot fish, repair coral or do construction or repair. Reason is I'd rather be productive. Thoughts?
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