Nitrox: 5 Situations For Every Scuba Diver To Use EANx

[@DiversReady]

Don't forget to send us your questions with #askdiversready What have you always wanted to know from a Dive Instructor but were afraid to ask?!

[@stephenhenshaw8625]

I would be interested in that one. afraid who are we kidding???

[@magicman9486]

I have been diving Nitrox for 25 year. has nothing to do with depth or otherwise. It is about being able to drive home after 2 dives without falling asleep.

[@CFSTB]

Yes, for sure. 2 tanks of air and I don't mind having an afternoon nap. But a 3 tank dive with Nitrox, and I'm still good to go all afternoon.

[@StonkeyKong]

This is a pretty funny comment to me. I never dove with Nitrox. But I just did two wreck dives on air today and fell asleep right after. 🤣

[@EEDIR-DK]

For anyone curious on the rules of nitrox and depth. It's about the partial pressure of oxygen (using bars and meters to explain). For every 10 meters you go down, the pressure of the gas you breath in increase one bar. Surface 1 bar, 10 meters 2 bar, 20 meters 3 bar and so on. At the surface the partial pressure of oxygen is about 0.21 bar (as atmospheric air is 21% oxygen). You shouldn't get a partial pressure more than 1.4 of oxygen (about 56.6 (185 ft) meters down on air, known as the maximum operation depth), since you are at a high risk of cramps and convulsions. When you increase the oxygen content of your mix to 30%, your maximum operation depth is only approximately 36.6 meters (120 ft). Calculation is somewhat simple Mod in meter = (1.4/O2p - 1)*10, where O2p is the oxygen content in your mix (for air 0.21). Most modern dive computers can give you, your MOD. Get a nitrox course, it is one of the most value for money specialty courses you can take, and is valuable in every corner in the world, where you intend to dive.

[@CrazyScubaCouple]

as a user from the metric system, i greately appreciate you taking the time to think about us too ^_^

[@Pilot545]

Absolutely LOVE your channel! Melbourne FL here. Just discovered your channel a few days ago. I’ve been PADI certified for almost 30 years but it’s been forever since I went diving. I’m about to get re-certified next month and am getting my partner certified. Your channel has been a huge help to me in getting back in the game after 20 years. Basics are the same but so many more options out there now. 👍🏼

[@DiversReady]

Welcome aboard! Thanks Mike!

[@DM-ty1fe]

I’ve never really agreed with diving nitrox and setting your computer to air..... You lose your O2 CNS tracking and if something does happen, no one including the MD will have an accurate idea of your loading. If you want to dive more conservative, change your gradient factors etc. or dive a more conservative profile. Just my opinion.

[@mewt100]

Agree

[@1003willy]

exactly... your computer is responsible for your real time safety, if you set it on air it wont know when you have entered "dangerous territory"

[@ABCDiver]

definitely agree. unless the entire dive is guaranteed to be well above MoD, this is a disaster waiting to happen.

[@LouisSJWolmarans]

Tx again for the awesome content James. My wife and I did our Nitrox certification 2 years ago on recommendation of the DM on location. Makes me much more relaxed knowing that we are even a little safer when done correctly. Keep up the stellar work!

[@bubblef8073]

If your NDL cuts you short you can adjust your depth as well, wrecks start at sand bottom and often stand more than 40 feet tall, reefs are not flat most often they also range in depth! I am not rich, so I rather not sacrifice the extra 20 bucks and get one or two more dive trips a month! Nitrox is awesome, less tiring more time under water less surface interval! Way to go!!!!! Like your videos!!!!!

[@jesspeoples3292]

I love diving nitrox. It was my very first specialty course. After diving nitrox, I feel fantastic.

[@DiversReady]

Love this! Thanks Jess! Dive safe, James

[@richardpoh4785]

more energy?

[@jesspeoples3292]

@@richardpoh4785 it depends. Diving with nitrox affects everybody differently. Some people feel great or feel about the same diving with air.

[@JamesCarter-tc6bo]

I feel exhausted after an air dive, much better with Nitrox. Maybe I should do a blind comparison to see if it is just psychological!

[@seppu6000]

@@JamesCarter-tc6bo Same @me. After 3rd dive i go up too the boat easy. On Air i need a little bit help.

[@JimmyLegrand]

Reason number 5 ! As soon as I can use Nitrox, I do it. As you said there is always a risk when you dive. So if we can do to minimize this risk, let’s do it. Just one thing is a pity, it’s the 1.4 ppo2 limit in the SSI/PADI world which limits the depth at 36m with a 32%. So if I want to dive deeper, I should use air which is more risky. The limit in France is up to 1.6 and so far as I know, it doesn’t cause more accident.

[@EEDIR-DK]

I think that limit (1.6) is for the safety and decompression stops. Advanced nitrox in CMAS regime allows you to go there, but they do recommend 1.4 on the basic. The effects of gasses is very individual, so the limits are very conservative for your safety, as they were derived from US navy diver experiments (which were people in very good shape).

[@david52875]

If you want to dive deeper, you should use trimix, not air.

[@svr5423]

PADI limit is 1.4, the "medical" limit is 1.6. So Padi adds a 0.2bar safety margin. Keep in mind that every body is a bit different. That's why the popular Nitrox blend is 28%, as it allows you to dive to maximum recreational depth. However, often premixed tanks have only 32%, which adds an operational limit to your dive. Adjust your dive computer accordingly.

[@jamesgorman5001]

Thank you. I'm getting back into diving again after retiring from the Navy. I've really enjoyed your vids and find them very helpful!

[@jumbodog5955]

It’s been a while since I went diving … and this was a perfect refresher😊 thanks man ! If you just cover safety procedures / other effects / mitigations / checks and partial pressures / etc - you’ve pretty much got the full certification covered my dude 😂

[@peterturnham5134]

Hi James, I'm also English but I was trained French Federation III around 1990. That meant multiple rescue dives 40m+ in the English channel which is Very black at -40+ and i14centigrade. It ended with a -56m dive onto a WW2 wreck. So I am rated to -60m. No decompression diving does not exist for me I control my depths and my tank and control the stop. Now I have dived Florida and Key Largo, there are some good dives, but I won't dive 4-5 dives of Padi splash and dive at 9metres. I will take 2 dives at( 20+ where it is more comfortable t(o dive. Now why don't I dive Nitrox? I object to paying 100s+$ for something you can learn in 10 minutes. I have dived Nitrox, in the Red sea. There Nitrox is free on the cruise boats. When the"y see an experienced diver they give them a tank automatically. I ask the %, I get him to check the % while I watch I ask the dive-master to confirm maximum depth.. Honestly I can't tell the difference Nitrox or Air. If I get 60 minutes underwater that's OK for me. As you see I'm a very bad man, diving on Nitrox without your special card. However 99% of the time I insist on Air and have learnt that my Buddy should be on air too. I am an underwater photographer and IF it needs another 5 meters to get THE shot I will go for it. If it means a shorter dive, 10 minutes decompression and someone screaming at me on the boat so what.

[@davidanderson5259]

After getting Nitrox certified, I figured these points out myself, but it's good to see them listed. One rule I have is always to do my last dives on holiday as nitrox dives, to give me an extra margin of safety on the airplane flight home.

[@bunhead8]

I do this too! I generally don't need it for extended days as my profiles are overly aggressive, but for the last day it will reduce your residual for the flight home.

[@TheEpoxyExpert]

Not supposed to fly and dive ever in the same day.

[@anonanon3066]

@@TheEpoxyExpert wasnt it 12 hrs after the last dive, and 18hrs after the last dive, if that wasnt the only dive that day? so you very well can fly home the same day.

[@adampilot8275]

This lad answers my questions without be having to ask them. Top job Jamesy...keep up the good work. Dive safe and dive often.

[@stephendoherty8291]

You can in theory dive as if you are on normal air and Nitrox just gives you added safely (presuming you don't dive deeper than 40m and you know your nitrox mix level). the benefit is that you often feel less tired after multiple or longer shallow dives.

[@indysilver_02]

I'm starting my OW course with Nitrox this Saturday. 😬

[@johnrice8728]

I'm over in Naples, Fl in September and looking for some diving. Bsac Advanced diver with 500 + dives.

[@ahrenek]

I often have headaches after diving but when I dive with nitrox, I don't get a headache. Does anyone else experience this benefit?

[@alluraromel392]

Love your videos! This was a good EANx info refresher for me. Now I don’t feel the need to dig out my book. I got EANx certified just a few days after my PADI Open Water. Had to take time off during COVID to keep my mom safe. Now that she is cancer free & vaccinated we can start diving again. 🧜‍♀️🧜‍♀️ Can’t wait for her return to SWFL so we can go hunt lobsters in Pompano Beach.🦞🦞

[@bigmikc]

Haven't taken my open water cert yet but I'm learning a ton watching these videos.

[@____________838]

But you’ve got your certification planned, right?

[@marklafavor9321]

Hahaha! I did notice the switch on the computers...only because I dive with the Perdix! Had my wife watch this so she could better understand why Nitrox is a great option depending on what you are diving. Thanks for the awesome videos.

[@slgarrett]

I’m sold. I just finished my opened water certification. I guess next stop will be Nitrox.

[@cgaet]

I noticed the computer switch! It was really nice of your buddy to let you use that shiny perdix AI

[@DiversReady]

bakrugger thanks! He’s the okayest buddy I’ve got.

[@tontsyy]

Thanks for this ! Keeping my knowledge topped up as often as possible when I’m not diving!

[@garysmitherman]

Great clear explaiantion James . Good to hear your southern English accent . From a Brit over the pond.

[@norbertosalazarzagaglia6216]

Thaks a lot James for clarifie may idea in NITROX matter, I va just got my license to dive with it. But I just come across a comment about that as I was told that the deepest dive suppose to be the first one of the day... now they said that it does not matter?what is the right answer

[@eamonshields2754]

Phenomenal video as usual, getting my Nitrox cert over at Jupiter Dive Center soon 🤙🏼 Safe Diving

[@elleneddy9394]

I dove with JDC early this year. 1st rate dive center, professional individuals, the lemon sharks were phenomenal.

[@eamonshields2754]

@@elleneddy9394 they are probably my favorite in Florida. Awesome people, incredible drift diving. I did all my drift dives to 90 feet on air haha, didn’t have much bottom time but many I saw a ton. Safe diving

[@eddybrownII]

Is there any different equipment required for ENRICHED air?

[@DiversReady]

There is a transmitter that reads the air that the dive operator will provide for you to check your tanks. As part of the training you learn how to read the transmitter.

[@theonlyianwood]

Great no-nonsense video, I think nitrox is great and air should never be used, except to fill drysuits! With regards to using nitrox but keeping the computer set to air to add a safety margin. Isn't this potentially dangerous as the oxygen clock won't be calculated correctly? I wonder if this could lead to problems, especially with long or deep (higher ppO2) or repetitive dives? It seems to me a bad habit to get into and setting the computer to be more conservative would be safer all round?

[@complicatedmechanics9599]

It is potentially dangerous. If you use a computer supporting only air, use tables to track your O2 exposure. If your computer support enx, no reason to don't use it right. Adjust conservatism if you want to be safer.

[@brois841]

@@complicatedmechanics9599 I know this is an old comment, but I don't think there's been a dive computer made in over a decade that supports air and not Nitrox up to 40%. Use your computer, people. It's for your safety.

[@sand_shifter]

My wife and I did our Nitrox cert and Padi Deep dive cert on the same cse ... ideal

[@harrodharrod5239]

I'm not sure about rec nitrox. I know some people say you will be tired less, but I personally don't observe that. However, having just completed 2 decompression dives - one using air during deco and the other using 50% nitrox (both ~75 minutes with ~15 min deco), I felt really fatigued after the deco on air dive, while I was super fresh after the 50% O2 decompression.

[@alrobinette3475]

So if I understand correctly at the end. Diving Nitrox on every dive is a good thing if you have it available regardless of depth? One of the main dive spots I dive every Sat is 60' at the deepest and I am usually 25-40' most dives. So Nitrox would not change my no decompression time but it would reduce the nitrogen in my system reducing the risk of the bends decompression sickness.

[@andreasoberg2021]

Yes Nitrox is usually better as long as you do not dive deeper than its limit but it is very important that you do notbdive deeper than those limits

[@simon1234567ful]

Less fatigue coz of less N2 in the tissue... maybe another point

[@DiversReady]

Hi Simon! Thanks for watching! I hear this a lot but I can't find any study that looks at the effect of Nitrogen diffusion and perfusion on bodily fatigue. If you know of one, please share a link. I can't say from personal experience that I feel less tired after Nitrox than Air at the same depths, but that doesn't mean it's not true. James

[@simon1234567ful]

@@DiversReady Symptoms increase with increasing depth below 100 feet. At 300 to 400 fsw, unconsciousness may result from the anesthetic effect of nitrogen at this pressure. Fatigue, heavy work, and hypothermia can augment the narcotic effect of nitrogen. Symptoms disappear immediately on ascending to a shallow depth. www.google.com/url?sa=t&source=web&rct=j&url=www.sciencedirect.com/topics/medicine-and-dentistry/nitrogen-narcosis&ved=2ahUKEwjY8siOjvnkAhUPsKQKHcWcA_0QFjABegQIDBAG&usg=AOvVaw1bIXkIqSUHISTEuOZbZqYq

[@simon1234567ful]

@@DiversReady thats what i found googling for 5 seconds. Nitrogen does have an anesthetic effect as stated. If high doses make you unconscious i think the assumption that nitrogen makes you a bit sleepy/tired seems plausible. Ill check if i find more on that

[@lmlmd2714]

I'm not aware of any cases of *fatigue* being reduced due to nitrox. Does it help moderate *narcosis*? My take is "Sort of.... but", as the partial pressures of N2 are reduced, leading to less severe narcosis. *BUT* for the effect to significant, the reduction in PPn2 would need to be likewise significant, which means it would likely only be noticable on nitrox mixes with a high oxygen percentage. These mixes have a shallow maximum operating depth due to the high partial o2 pressure, making the effect redundant. As an example, BSAC training emphasis a maximum PPo2 of 1.4 BAR, which limits Nitrox 36 to 27m under BSAC Nitrox table rules, at which depth narcosis is very unlikely be to have a notable effect.

[@TreasureDivers]

Great subject James, I'm off to Spain soon to do my Nitrox training . Thanks for sharing . David

[@markberger5739]

doing a series of dives on air can be progressively exhausting - do them on nitrox = oxygen spa diving - usually come back feeling fresher 😆 this has to be safer - tired people make (sometimes catastrophic) mistakes

[@joshs3916]

Great video. I really like that dove helmet on the shelf, actually have the same one, recall where you got it? Anyways, I’ve been looking at Nitrox sicne I got certified in ‘15 and agin in ‘19 when I got my AOW, think I’ll be getting it in the coming weeks.

[@ozjohnno]

Speaking of someone who 'huffs and puffs like a pissed off dragon', this is a great video. I do feel like I get some benefit from nitrox when diving more than 3 dives a day, but did the nitrox course anyways cause of the longer bottom time (if my sac rate wasn't so abysmal) and cause of the added safety margin. I dive twins now and nitrox32 costs me $45 a refill, but would still dive nitrox even if it cost more (for the safety margin)

[@DiversReady]

Hi John! Thanks for watching. That's some pricey Nitrox you have there! $22.50 per fill? Can I ask where in the world you are based? Cheers, James

[@noob2reefer]

Hello James, aka Divers Ready, I had a new diver turn me on to your KZbin page because they don't feel comfortable asking experienced diver. Way to create a great resource for the diving community! On to the topic at hand EANx, for me I feel better after a dives. When I first start diving EANx it was to maximize my NDL in the range of 80ft to 110ft as well help out with my END (equivalent narcotic depth ). As I got older I started notching the differences between the air dives vs EANx dives to the point I only dive EANx. This is my opinion, I feel the video brushed off the real danger, and that's the MOD (maximum operating depth). As a tech diver I use two MOD a working MOD, the gas I use while swimming around. I keep that ppo2 at or less then 1.4, because one can suffer oxygen toxicity at a ppo2 of 1.4 and higher. MOD number 2 is my rest/deco ppo2 and it's not a basic EANx topics. Other then that I think you did a great job keep up the good work! “Plan your dive. Dive your plan.”

[@mewt100]

Safety and risk mitigation is paramount. Attention on MOD is required please.

[@purseseine]

Hi James, good video, but during point three I think you should make it clear that a mix must be assigned to a depth and we don't simply take a mix on a dive. Cheers Mark

[@DiversReady]

Hi Mark, thanks for watching. Your point is valid, of course, but please bare in mind I'm not teaching a Nitrox specialty through KZbin! There is lots of information about Nitrox not in this video, but you're right that point could be made. Cheers, James

[@purseseine]

@@DiversReady Hi James, thanks for responding. No of course you're not, it just stood out and I felt it relevant in context of the video. Cheers and keep up the good work. Mark

[@markgiltner7358]

Out of curiosity where did you learn or why do you think that Nitrox is a must on deep dives. I routinely dive to 170 plus on air but use 40% on my deco stops from 30 foot or deeper, switching to 100% 02 at 2O foot and above. The 100% isn't an absolute number anything above 80 % is fine. I can understand where using higher 02 content at depth would smooth out the dive profile and have less shit to worry about, the deco time involved with those profiles are hell to pay lol. But was mainly interested in you views on its a must kinda thing.

[@Yggdrasil42]

Excellent video! Clear points and well presented.

[@DiversReady]

Thanks Yggdrasil42! I appreciate the feedback. What video would you like to see next? James

[@mixxxmaster74]

"...huffing and puffing like a pissed-off dragon......" loved that comment...lol.... I love watching your videos... your videos actually tweaked my interest in this awesome sport.... I am starting my open water diving course soon and will do an advance course right after that.... Thnks a lot... AK from Canada

[@DiversReady]

Thanks AK! Love to hear that you're getting into the sport more and more! Good luck on your courses. All the best. James

[@christophhubner5702]

"Every breath you take" Haha, nice one ;-)

[@DoctorWessamAtif]

Good video, i think the only one I found to mention the fact that you can plan for air and dive on Nitrox! Quite humorous too :) Keep it up!

[@DiversReady]

Thanks! Dive safe.

[@1003willy]

you can plan on air and dive on nitrox but dont exceed your MOD or your dive com have no idea that you are entering dangerous territory

[@pandapup_inbootz2586]

The mask the diver has with the animal muzzle !!! Where can one find it I love it !!!

[@jaynct]

Just came across your video great stuff. Girl and I are going to be in Key Largo this weekend for our open water dives, and we are doing Nitrox certification concurrently.

[@sportdiver0077]

These are great. Nice to have a level headed perspective to get more people into the sport. And let's face it (Sting) was great cameo ;)

[@marshallbreite3504]

I don't get to watch all of them (And am a relatively recent watcher) but I really enjoy your videos. Thanks!!

[@DiversReady]

Thanks Marshall! I appreciate you, buddy. Dive safe, James

[@momoniji6439]

Situation 1 and 3 are the same thing, I'm not a liveaboard for Situation 4 Situation 5 isn't really a Situation it's just you saying "why not" in the most complex way possible. As for Situation 2 I'm not really sure what happened there it was a story at the beginning that turned to you telling us to change our computers gas to nitrox from air or nitrox becomes useless.

[@JURASSICDIVERUK]

Another fantastic video!

[@DiversReady]

Thanks HobbyMan!

[@frankbeeck2259]

Great vid James, keep up the good work👌🏻 Greetings from Holland.

[@DiversReady]

Thanks Frank! Dive safe, James

[@nordle8325]

well explained

[@zezo1389]

Hi , your constant follower from Jeddah, Saudi Arabia and I am currently studying as a diving guide. Very nice explanation. A question arose when I watched the clip. I saw you round the number to decimal places. SSI table (we have the metric system). If there is no number in the calculations that matches the depth numbers in the table, do we jump to the higher number, or take the lower depth for safety precautions? . With thanks for your great effor

[@1003willy]

if you are becoming a dive guide yoi should already have a dive computer...

[@aldobas77]

How do I know if my set of hoses and reg are ok to use with nitrox? I have a xt1 and xt2 dive rite first and second stages. I know these should be ok, but how about the hoses for the gauge? Thanks :)

[@bunhead8]

ha ha, I just bought a new perdix! great vid, thanks.

[@DiversReady]

Thanks for the support!

[@UNgineering]

the problem with leaving your computer set to air, but diving nitrox is you have to be very careful about your depth. you don't want to go to 130' on EAN40

[@shadwabarghash8734]

it doesn't exactly give you more energy, it just (as my instructor put it) doesn't cause as much after-dive laziness (if not fatigue) as (21%) air does

[@chrisanthony579]

I think it depends on the person, some say they experience less "laziness" others don't seen any difference.

[@Wrenchmonkey1]

@@chrisanthony579 I think it's going to come down to overall individual health. If you've got good lungs and good circulation, richer oxygen mixes will probably be less noticeable.

[@andreasoberg2021]

The reason we get tired is that there are small nitrogen bubbles in the blood that last quite a long time. With nitrox you have less of these.

[@discipleshipmovements]

How to find a good diving shop for dive master training ?

[@DiversReady]

We made that video! kzbin.info/www/bejne/nXzXfqWYas6WacU

[@aymenem5304]

Good job jamea Imma have my certificate next week on Nitrox Excited for it

[@Findingmenno]

Time to get that newly released upgraded Titanium bezel for your Petrel then James....

[@DiversReady]

I'm hoping to poach one at DEMA!

[@rockitnow989]

Thanks for this cool video! The price of the nitrox depents also from the country. There is sometimes a big difference. Like in egypt usualy nitrox is for free. But in thailand, there you pay like 15 USD for a 12l tank.

[@mysteryliner]

Because they know it will limit the customer from doing deep dives.

[@1003willy]

it depends on many factors as well, usually if you are diving from the mainland, oxygen is easier to get and fill, if you are getting the fill on an island, the logistics of transporting big o2 tanks makes it more expensive to fill. If u said 15 usd for nitrox in thailand is the owner of the divestore having to go rent and fetch your nitrox cylinders from another center

[@divechroniclesofrocky]

Come on Dude!!! I catch the computer thing every time I rewatch the video!!! Awesome videos, love learning what you have to share! keep it up! Or is that down.... ??? A Shearwater Perdix AI is in my near future.

[@DiversReady]

Hahaha! Someone caught it! Thanks for watching Rocky! James

[@CaptPegg]

Cooking a full Sunday roast, with Yorkie Pudds while watching divers ready..Good Sunday.....

[@DiversReady]

Love that! Haven't had a good roast in ages!

[@moocowp4970]

I got my nitrox cert before my advanced open water. But tbh, since I don't have any diving friends ( :'( ) I always dive with dive companies, which means almost always that there are rookie divers, which means I'm yet to dive a dive where someone has come close to the no decompression limit before their air ran out. It also more than likely means not everyone is diving nitrox (which means the benefits of nitrox are mostly neutralised). So I'm yet to actually effectively use nitrox with benefit haha.

[@noorhanidickson7190]

I’m in the same boat

[@brois841]

Go on deeper dives, that may weed out some of the rookies. Additionally, you can always pay to have a divemaster be your buddy. Really depends on your goals, but there are so many options.

[@enjoi679]

Would you recommend a diver who is fresh out of OW course, getting nitrox training or do a few dives then get the training? thanks!

[@DiversReady]

Get Nitrox immediately! It's never too soon, it will improve your scuba theory and as long as you analyze and dive it properly, it will keep you safer.

[@ScubaDiverMagazine]

Great Video James!

[@paulburgess9573]

Hi James , love the content . As a beginner and just into my advanced open water ( studying and learning) find your videos informative fun and also makes you think and question stuff . I'm in Bournemouth on the South Coast so learning is food but not quea largo lol

[@DiversReady]

Great to hear! Dive safe.

[@nelsonp4238]

Great video, informative, educational and to the point. Thanks to you now I will take my nitrox cert.

[@rockincoltsify]

Great video!!!!!

[@DiversReady]

Glad you enjoyed it

[@simonajanehallevansinstagr154]

I love all your content. I got my open water certification in 2016 and went to the Bahamas, loved it and loved the shark dive. I never dove again ( i lived in SC at that time - the swap dives just don’t do it for me lol ) now I’m of to get a refresher course, in Colorado - Will defo add the Nitrox course on my list to do next week. Can you possibly do a clip on good computers to get ( middle ground) the ones that hang or wrist ones? A little confused about that. Thank you.

[@Richard1976]

Can you use the same regulator from your normal tank to nitrox and back again? Or does it need to be cleaned or something? And the manometer reading is that the same? Reading my computer what will change beside the mixture?

[@bornaluckyman1]

Love the contents and your honesty buddy , keep it coming ...

[@DiversReady]

Thanks David! We appreciate your support, buddy. James

[@fullmetal1002]

Hi James, could you answer 2 questions for me. I'm planning to do a Liveaboard trip to the Similan Islands next year when the Inter country ban has been lifted (i hope) in my country, i just have a couple of questions that i would like to know. 1) I want to dive with a nitrox blend on certain or maybe all the dives, do they charge for the nitrox for each time the tank is refilled or its just the tank and the refill is complimentary throughout the dive trip? 2) Since i read that some divers would want to do specialty courses on Liveaboards, i want to do a Deep Dive Specialty, my question is can I actually do that course with a nitrox tank? My brain tells me no because of the oxygen toxicity, but i heard some people say yes. Which is it?

[@1003willy]

answer 1 if your liveaboard package says free nitrox then you can request for nitrox, if not you will have to top up nitrox charges for each tank. answer 2 you can do deep diver specialty courses on nitrox BUT you are limited to only 27%, most popular nitrox mix 32% is good down to around 33 metres based on ppo2 of 1.4

[@andreasoberg2021]

Air is usually used on the deep dive very since it is 40m but a lower nitrox mix could probably be used

[@marineboyocean]

You didn't explain the Nitrox for Deep Dives correctly. Nitrox is a must for Deep Dives and by Deep I mean up to 45 Metres. 147 feet. 26% Nitrox which I use regularly on Deep Wreck Dives give a PO2 1.4 @ 43.8 metres and PO2 1.6 @ 51.5 metres.

[@DiversReady]

Hi Mark, your maths above is correct, but that doesn't contradict what I was saying in the video. The common misconception that I see divers make is that Nitrox allows you to dive deeper than air. It does not. It allows you to dive longer at a given depth, but the relationship between O2% and depth is inverse. The deeper you go, the weaker (less O2) your mix needs to be. The example I give is a 90' dive plan shows the extension in NDL for using Nitrox over Air at the same depth, to highlight the benefit of longer recreational dives. When I teach advanced Technical Diver courses, we use mixes with LESS O2 than air (Normoxic or Hypoxic) to reach depths below 50m. Thanks for watching, Mark. Dive safe. James

[@MrMatzetier]

When you go for deep, the po2 is important. A cc system (rebreather) operates every time with 1,3 po2. When a rebreather diver is @100m he have a trimex mix with 1,3 po2. And at 30m he also have a 1,3po2.

[@arp202]

Hi James. Thanks for another useful video. About Nitrox, I've had cakes and crumbs when taking about this gas with others, regarding Jr or young divers (between 10 and 14 yo). Some say it's highly recommended, and some absolutely NOT for children, and of course have heard all the opinion nuances in-between these 2 extremes. What would you your take on this? Many thanks for your past present and future videos. Appreciate them very much.

[@stephenhenshaw8625]

yes agreed on some for a change

[@13thAMG]

"Huffing and puffing like a pissed off Dragon" 🤣🤣🤣🤣🤣🤣🤣🤣 PMSL! (But the Sting song reference was typical cheezy Englishman style. Ha ha.)

[@MrOlaf1966]

Seriously, they charge you 20-30 USD per day (2 dives) additional for Nitrox ? Great business, since the cost for the O2 is 2-3 USD.

[@DiversReady]

Hi MrOlaf1966. My wife and I did 4 tanks of Nitrox yesterday in Key Largo and the Nitrox alone was $43 and change inc. tax. Yes, the O2 per bottle (if they're blending using partial pressure systems, is probably about what you said. But the rest isn't pure profit. They have to O2 clean tanks, service the tanks, maintain and service the compressor, pay staff to fill, maintain an analyser, a booster pump... etc etc, all of which costs time and money. But, you are right. Yes, they are a business and they are making profit on it. Thanks for watching! James

[@diveinstructordaniel1095]

Divers Ready I had free nitrox in marsa alam

[@brois841]

MrOlaf, depends on if you have your own tanks or not. Sounds like James is (or was) renting tanks at that price. The difference between air and nitrox is about $2 dollars in Florida.

[@1003willy]

if youre diving nitrox from an island is more expensive because transporting large bulky o2 cylinders by boat is very costly

[@Teampegleg]

I've never had a dive boat captain care about my deco status.

[@DiversReady]

That's good to hear! Dive safe, James

[@christopherkeene9]

Exactly! Unless you blow through your stops or exceed the time limit they set, they would never know.

[@Yggdrasil42]

Team Peg Leg I've had a liveaboard buddy who was reprimanded by the dive guides because he had his computer set to air while diving Nitrox and hadn't told us. He exceeded his computer's NDL and had to do quite a long stop, while he was already in his reserve pressure. The guides were not amused since they had no way of knowing the stop was optional. Don't think the captain heard of it.

[@richardpoh4785]

use air mode on computer breathing nitrox? how do we know then we are hitting O2 toxicity

[@Teampegleg]

@@richardpoh4785 Within a recreational context O2 toxicity, as long as you take some precautions about your depth so you don't violate 1.6 PPO2, isn't a very high concern. Personally if I wanted to be more conservative I would just adjust my GF high down, but that is an option that comes with better computers.

[@sayittrue9570]

Hi James.Bob here good vid again and pretty informative.i recently took my Nitrox course and yes it's a pretty involved course more about mathematics than anything .so long you keep below your po levels you should be alright.my eon core does the maths for me and gives me my max depth for a specific blend.Again great vid

[@DiversReady]

Thanks SayITrue! Dive safe, James

[@Yggdrasil42]

sayittrue I just completed Advanced Nitrox and Decompression Procedures. I really had to drag my math skills up from the depths of my brain. Great courses but quite challenging.

[@michaelanderberg]

I did see the computer switch - guess I’m a geek :) but I just thought, “ huh, that’s interesting” and kept on watching the great content.

[@jaymcnaught6204]

Liking the videos keep them coming 👍🏼👍🏼

[@DiversReady]

Thanks Jay! That means a lot. Dive safe, James.

[@jaymcnaught6204]

Divers Ready Hi James, I know you don't want to hear this but you've hit a nerve and I've been following your mouthpiece Monday (by the way there really good) at last someone is speaking the truth and saying what it's really like. I've been diving since 94’ish with BSAC (good old military) then after a very long basic time waist 9 months of me being ready (always ready) getting the boat ready on more than one occasion. I got drafted to Belize for a nine-month tour, there I found my way to PADI 👍🏼. Finally got to my OWSI and have been an instructor for over 10 years, but been very disappointed in the UK diving seen so I stopped. Manly same old dive sights same old dive boats captain's won't go where you have planned and advertised, and also the cost it ended up in excess of £35=$43 a night dive. So I became a warm weather diver just dived for fun not interested in making money off people and rinsing them off their cash. Like I had done to me. Two years ago I started teaching again did a few Open water courses all for free, in Sri Lanka, I got my passion back for it, thanks to Andy amazing relaxed instructor & Tobi (he’s should be a 5star Instructor by now LOL) & Una Tuna Dive Center. So I’ve got back in the saddle. I’ve linked my self with a friendly dive centre back home (not as often as i would like (due to the nature of my job) Coast 2 Coast Scuba Diving. Very friendly, helpful, somewhere I can give back my passion to very likeminded people. In the meantime watching your mouth peace Monday has helped me, I guess I just wanted to say BIG *thanks* don’t stop. OWSI # 628244 Jamingood

[@bigdougdog]

Great content, thank you.

[@julianosorio1360]

Hey James, thanks,!!! great and clean explanation!

[@blwilso1]

Thanks for the amazing content. I recently became OWC and discovered your channel as I was getting certified. Did have a question about "reduced SI when diving Nitrox." I'm getting Nitrox certified, but PADI recommends 1 hour SI when breathing enriched air (due to concerns with oxygen toxicity). I understand that this is a recommendation, but doesn't this negate one of the best reasons to dive Nitrox? Just trying to find the right place for Nitrox in my future diving.

[@1003willy]

1 hour SI is quite common even on air. Anything less than 1 hr may be calculated as a continuous dive on your computer. The reason padi recommends a 1hr SI is based on the dive tables where you move down a group which will give you extra ndl. If you are concerned about toxicity, your dive com will calculate real time ppo2 limit for you. There is also the maximum 24 hr o2 exposure limit of 180mins and a single dive limit of 150 mins. As long as you stay within these limits you'll be fine.

[@DarthMuffin007]

I know this video is “old,” but I just wanted to comment anyways. I always dive EAN even when on a shallow reef; it is just safer. Period. The only time I will dive air is if I am on a deep wall and even then I will carry a stage bottle of EAN for gas to 30m and then cut over to air….and the reverse on ascent. EVERY DIVER SHOULD SHOULD BE EAN CERTIFIED.

[@Richfxx]

Huffing and puffing like a pissed off dragon lmao isn’t it awesome we live in south Florida and can dive almost every weekend

[@kurttidd8922]

Why wait for the weekends? Live in the Keys and dive whenever the weather doesn’t prevent you!

[@DiversReady]

8 days a week! Let's go!

[@kurttidd8922]

Divers Ready ...and then there’s weather like today... oh well, good reason to do some gear maintenance!

[@hpeterson10579]

So for real I can get my open water and nitrox simultaneously??

[@DiversReady]

Highly recommended! I even give a discount if you do your Nitrox and OW together, because I want all divers to have Nitrox!

[@sashababich827]

Which nitrox compressor do you recommend?

[@ericmcginnis6499]

I was in an accident- rod right tibia, fussion T10 11 12, replaced right hip, plates right elbow, C7 fracture, memory loss (all the fun stuff). My doctor shot me down for scuba, but my question is would Nitrox help in an argument with my doctor or should I just stop because of too much damage? I would like your opinion on this thanks much

[@brois841]

Don't ask the internet for medical advice. Also seek a doctor that understands the risks associated with scuba - not your primary care physician. I'm sure there are plenty of doctors who dive and are Nitrox/Advanced Nitrox/Trimix certified. You didn't mention why the doctor shot you down by the way and why you think Nitrox would help.

[@peterk814]

What kind of dive computer is that

[@ultrasupernectar]

"and If you don't like it...click the thumbs down twice" hahahahaha nice advice, well played, great video

[@Pavulon10988]

Very good videos.

[@Kirbythediver]

Why only twitter? FFS I don't use it. Twitter is dumb, just do comment section

[@DiversReady]

I wish I could Matey, but you can't use hashtags to filter for questions on the YT comments section. That makes it hard to find the actual questions! We use IG too. Same handle, smae hashtag @diversready / #askdiversready

[@scubajunkie6591]

Great video, thanks James !!

[@DiversReady]

Glad you enjoyed it

[@svr5423]

My biggest pet peeve with Nitrox is that it is not readily available, especially not in the popular 28% blend (so you can go to maximum recreational depth of 40 meter at 1.4 max PO2) It is bad very advice to use the the dive computer in air mode when diving nitrox. Don't ever set the wrong gas mix in your diving computer. Especially because it will then indicate the wrong PO2 levels, the alerts will be not where you expect them and the calculated maximum depth will be wrong. Oxygen poisoning when diving is not fun.

[@jeremyfranks9587]

“Thumbs down button twice”, 😂!

[@Jamesbourke7]

nitrox is also good for nursing a hangover. :)

[@stephenhenshaw8625]

just O2 that sorts it

[@1badsteed]

When my dad served onboard USS Midway CV-41 during Vietnam, he'd get hammered and get back to the ship. Wake up with a hangover, take a hit of the O2 in the cockpit of the jets onboard (no he was not a pilot!) and feel just fine. Wonder if it is the same thing?

[@petershearman9484]

Dangerous to dive Nitrox with your computer set to Air. No warnings if you breach your Nitrox depth limit

[@brois841]

depth or time limits

[@Wizatek]

I prefer to dive with my personal nitrox blending machine on my back, giving me always the best blend available