World Record Deepest saturation dive 534m

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Deepest saturation dive
World record
534 m (1,752 ft)
COMEX Hydra 8, Hyperbaric Experimental Centre, Marseille, France, 1988. Breathing a gas mixture of hydro-heliox (hydrogen 49%, helium 50% and oxygen 1%), it took four COMEX (Compagnie maritime d’expertises) divers, and two divers of the Marine nationale (French Navy), eight days to compress inside a chamber to the maximum bottom pressure of 53 atmospheres (780 psi). A total of six dives were conducted with a total of 28 hours of work at depths of 520 m (1,706 ft) and 534 m (1,752 ft). Once at depth, the divers conducted pipeline connection exercises in open water. After completing their assigned tasks, the divers re-entered the chamber for 18 days of decompression. The record openwater dive in the Mediterranean led to COMEX’s record experimental saturation dive in 1992.
COMEX divers: Thierry Arnold, Régis Peilho, Patrick Raude, Louis Schneider.
Marine nationale divers: Serge Icart, Jean-Guy Marcel-Auda.

[@gnarmarmilla]

How amazing. Thank you for sharing this.

[@YZFMANIAC08]

In my opinion these guys earn as much respect as astronauts

[@Sammy-vv9pq]

Yes sir !

[@justintee3241]

Nah not even. They're just swimming

[@pieterveenders9793]

@@justintee3241 At more than half a kilometre deep, exposed to 50+ bar of pressure. Astronauts are the ones who have it safe, they literally just spent some time in a space station at atmospheric pressure and are never exposed to dangerous pressures. Only space walks carry an increased risk, however they're extremely rare and the vast majority of astronauts never even make a single space walk in their entire carreer.

[@the_skips]

@@justintee3241 In that case astronauts are just flying

[@blitzbees890]

@@the_skips well you have to be super smart to be sn astronauts while to be a diver just dont be too dumb thats all lol

[@widget3672]

I love old science, it's like discovery and history at the same time.

[@mrdgenerate]

Yea i realized i dont actually wanna do science but i love the history of human discovery and learning how we got here and what we learned on the way

[@clashwithmoi8926]

Discotory!!

[@Mrich775]

Old science, but still the record to this day.

[@omgwtflmaololrotfl2368]

Old science but that exact science is still used today. The equipment might look different but the method and everything they do with saturation diving is still exactly the same.

[@OnTheHonda]

OLD science?! How often have you benn below 500 m in the ocean recently, dumfuck?

[@glennkrieger]

Both astronauts and deep saturation divers endure very close to the same experience: failure of protective gear means certain death; ability to be surrounded by a deadly endless dark expanse and still feel secure; knowing any real help is hours/days away if something should go wrong; and the absence of a blue sky/clouds for lengthy periods of time is no big deal. The interesting thing is that we all had to endure that environment to some extent during the 9 months we were in utero. Apparently some of us are OK with returning to our pre-birth environment later in life. But, how few. Just food for thought.

[@henerymag]

They must have some fear of what is down there with them in the darkness. My fear would be squids. Then again maybe they don't even think about it, or at least never let it show.

[@jzblue345]

I'd love to do a job like that

[@dominicchallenger5880]

@@jzblue345 life is short go get that job👍

[@candykanefpv98]

henerymag they have a task to perform. It’s not like they have time to let their mind wander. If they did they probably would freak tf out

[@lukeferreira7546]

Tarman The Champion it’s called last breath

[@pstreaks]

For those interested in sat diving I highly recommend movie/doco 'Last Breath' which is about an accident where the umbilical cord snaps on a deep dive

[@rocketqueen7355]

Unfortunate event, great movie 👍

[@DrNick1960]

kzbin.info/www/bejne/ZmKbi3uElLyYeKs

[@twoallbeefpattys3097]

Highly unlikely that would happen to you though.

[@pieterveenders9793]

@@twoallbeefpattys3097 True. It did happen to that guy though, luckily he survived it but only by the hair of his teeth.

[@jakeseabass6051]

Amazing doco, a must watch.

[@mccoybyz1099]

Why did they ever stop making documentaries in this way, very straight forward the facts , pertinent info & an intelligent sounding narrator. It's one of those more is less kinda things! Lol

[@patrciaclemons8183]

It's 2021, if it's not sugar or drugs or nudity, we don't give a sheet!!!

[@freelectron2029]

it was done on purpose. smart people are hard to fool and control. give them bread and circus. make them fat and dumb

[@MultiHunterOne]

The way they all have similar suits, how they exit the habitat and are met by dozens of people cheering, they're almost exactly like astronauts. I don't know if that was the idea of Comex at the time to make it seem similar but darn, everyone involved deserves utmost respect. That truly pushed the limits of physiology and technology.

[@markduckmanton4227]

I did 42m air dive once and I nearly shat myself...sweet Jesus balls of steel these guys

[@Spacefish007]

Depends on the environment i guess, warm sea water 40m feels like 20m to me on air, dive in a lake at 6°C and no light to 40m it´s a different story.

[@LLACEM]

Hey 42-metre dive was that a free dive lol

[@ScubaDracula]

@SHERMAN YOUNG Makes me wonder how NASA could have gone to the moon in the 60's or even do spacewalks for that matter... If they only accomplished 500+ meters in the mid 80's diving, I'd like to see how they handle spacewalk pressure in detail. Can't find any real documentaries for that tho.

[@blackbirdgaming8147]

ScubaDracula Well in space there is no pressure so it’s different. Space is a vacuum, the exact opposite of being super far down.

[@biayo79]

been there, same feelings

[@byteme9718]

I've been diving since the 90's and it still amazes me that at just 20 metres I have enough pressure in my lungs to inflate car tyres. The human body and understanding through science of how it works are amazing. As an engineer I understand the physics but that takes nothing away from my amazement.

[@freelectron2029]

38 psi is not a lot of pressure.

[@freelectron2029]

how about that stupid titan sub. they got inside a plastic tube pressurised to 1bar and immersed it inside in a fluid pressurised to 350 bar.....

[@byteme9718]

@@freelectron2029 That's relative.

[@freelectron2029]

@@byteme9718 i think about it like this, you could strap a full scuba tank to the outside of the titan and if you opened the valve water would rush in, not air coming out.

[@byteme9718]

@@freelectron2029 I stated pressure is relative. When SCUBA diving most lung injuries occur ascending from less than 10 meters.

[@russandh]

It takes less time to get back from the moon than it does to decompress from that depth

[@Berkcam]

This old record had been pushed to 701 meters, again by Comex. It's very doubtful that anyone will attempt anything deeper as there is no point commercially.

[@martinm.1967]

700 meters... wow that's crazy. O_o

[@Plutokta]

The 700m dive was a simulated one. They pressurized a guy the pressure of that depth in the COMEX facility on shore, but he didn't really dive. It was more of a proof of concept.

[@dansaber4427]

What would it take to dive the Titanic? Is it possible to acclimate to that kind of pressure?

[@dylansmith8061]

@@dansaber4427 probably not, at least with known breathing gas mixtures www.ncbi.nlm.nih.gov/pmc/articles/PMC5110125/

[@bigboicreme]

​​@@dansaber4427yes its possible to go to any depth if you match the pressure and saturate your body with the right gas mix, but there is really no point to go that deep

[@widget3672]

Gotta love that exciting 80s music. I wonder if that was going through their heads the same way we might now have different music going through ours?

[@samfutch8994]

This is seriously beyond anything im able to comprehend

[@francishermans758]

Very happy to see some of my previous colleagues again.

[@memegodjodox4854]

Francis Hermans you went THAT DEEP?

[@francishermans758]

Oh no Jank, for me it was only 184 m deep.

[@volvo245]

Does it feel different to move around in 18 ATM pressure? For example moving your hands through the air, does the air feel heavier?

[@SortaProfessional89]

Your a saturation diver? Thats crazy man, this may sound stupid but i just learned more about it very recently. I knew we could dive that deep, but i didnt realize the extensive process of doing it. I.E. spending 30 days in the chamber, having no voice lol, the process of decomp.

[@MrKinir]

Salut Papy One, content de te revoir ;)

[@MyCatInABox]

4:37 "...called the De-Hydronator." Well, I'd say that's a pretty apt name.

[@ozjohnno]

wow, 520 meters on hysrogen/oxygen mix. Simply awesome

[@marilyn3583]

I always have these awesome, ominous dreams about deep saturation diving. Both spooky and spectacular.

[@FrancesDLaurentis]

I'd be terrified to be a quarter mile underwater knowing I have 50 atmospheres of pressure bearing down on

[@DaOneJoel]

I've done about 72 metres on helox. The sat guys are just on a whole different level.

[@MyScubasteve]

yes but its not called Helox is it?

[@DaOneJoel]

@@MyScubasteve You're absolutely right, it's Heliox , must have missed the "I"

[@MyScubasteve]

@@DaOneJoel What was your run time to 72 m? What was your deco gas mixes and back gas mixes?

[@MyScubasteve]

@@DaOneJoel Hey I noticed on your FB profile Joel Daone from New Jersey. There is no diving pictures or even references to diving. Are you sure you went to 72 m?

[@quint3570]

@@MyScubasteve he missed the letter c in from of the m

[@ExcelTutorials1]

This is truly amazing!

[@Ronbo710]

*Love seeing the Rolex Sea Dweller in action!*

[@SkyChaserCom]

This is very interesting. Thanks for posting this. Interesting seeing them breathe this hypoxic diving mix (low oxygen %). I can imagine the voice timbre increase?

[@xcreeseseater38]

I just finished watching this BBC doc about saturation divers. I was not expecting to hear their voices like that. They breath heliox and their voices are SOOO High pitched its really hard to understand them. For a month straight I couldn't do it. Heres the link if you want to watch it was really well done and shows their day to day life for the 1 month at pressure!! kzbin.info/www/bejne/eGSliIaDp8ycaas

[@roadking1876]

Just simply amazing. I have hundreds of sport/deco/wreck dives. This is a whole 'nother ball game. I always wished I had pursued a commercial diving career when I was able to in my 20s. I was a great welder, a degree in ME, and loved diving and mechanical work. Did a few deco air dives to 200'. Crazy. But I was young and invincible, LOL. My buddy and I got a mild hit diving the wrecks in Truk, first dive that day was the San Francisco I think, 160 or so, didn't tell anyone on the liveaboard because they would have probably req'd evac. Went diving the next day on more wrecks of course! We were "pushing" the tables. That convinced me to be a little more conservative with the tables. You do stupid stuff when you are young. This is not one of the things in life to be stupid with. 530msw = 53 bars = 769 psi! 1% O2 at that pressure gives a partial of 7.7 psi, 0.53 bars. O2 toxicity starts around 1.3 bar. So a safety factor of about 2.5 for that parameter. Then Comex did 701MSW in the chamber. 70 bars, 1015 psi!!! O2 partial of 0.7 bar assuming the same 1% O2 mix. Still a good safety factor. H2/O2 or H2/He/O2 mixes are the only way to do these dives. The thing that would worry the hell out of me is a failure of some sort with the topside mixing/regulating/safety etc etc etc equipment.

[@foxtailedcritter]

This is so wonderful for you to share this. I wanna become a saturation diver and this is great history right here.

[@MrRUSINA]

Did you?

[@fille20200]

Good upload. Thanks.

[@theghostofbubba9127]

What was the name of the company? I didn’t quite catch it. Oh well, I’m off to use my Comex helmet and Comex rebreather to filter my Comex gas!

[@jacksonueland]

don't forget your Rolex Comex Submariner

[@DaOneJoel]

I think it's called "COMEX"

[@skeetersaurus6249]

Yeah, but the Comex 2 is nothing but a rip-off of the Kirby-Morgan 47...just a cheap-plug for their gear venue, that's all...

[@skeetersaurus6249]

Wow...a LOT of chemistry questions come out of 'Hydra' compounding...because unlike noble gas Helium, Hydrogen can form MANY dangerous compounds...from Hydrogen Cyanide (HCN) to various acids...and this raises MANY questions about how such compounds were/are avoided when divers are breathing such a 'HYDROX' mixture (or simply, a modified electrolysis of water!)...

[@skeetersaurus6249]

Yes, I'm aware that they are at 534 meters, 1751 feet (just over 1/4 of a mile) with a pressure around 790 PSI.

[@colinkensley]

Massive respect for these guys 17 days to decompress...and this was in the 80s how deep can they go today

[@rocketqueen7355]

Russians did 416 meters dive

[@MironBleek]

Still a record dive, nothing more achieved by now. We don't have anything new in saturation diving because of physics limitation. Hydrogen narcosis (Similar to LSD in effects) became a factor after 500 meters, so nobody risks rising depth limitations. In theory - we can use Hydreliox up to 675-700 meter depths, but it was tested only in decompression chamber (3 days at 67,5 bar and 2 hours at 70,1 bar, before weeks of recovery).

[@sparklessconnectionselectrical]

​@@MironBleekhow can a man live with only 1% oxygen?

[@MironBleek]

@@sparklessconnectionselectrical well, because of partial pressure on big depths.

[@sparklessconnectionselectrical]

@@MironBleek because it is so compressed?

[@WV-mx3dr]

That is absolutely mind blowing

[@simonlloyd7557]

The deepest dive Ive ever done was 62m...But this is a whole different ball game.

[@nickdawn3985]

Impressive.

[@volvo245]

52 bars overpressure...Madness!

[@morganfreeman5171]

Does it mean the atmosphere they are breathing in the suit and when they are in the bell is at 52 bar to compensate for the 520m water pressure and so there lungs don't get crushed by water pressure ?

[@volvo245]

@@morganfreeman5171 Yup and its why they would turn into a right old mess really quickly if decompressed suddenly.

[@stanleycates1972]

Requires unique mindset. Claustrophobic's need not apply.

[@charliecrome207]

Anything phobics need not apply

[@RipleySawzen]

>HAHAHA! I don't have claustrophobia! "And if you look UP, 500m above you is the air. And out that way into THE ETERNAL BLACKNESS is thousands of miles of water..." >agoraphobia kicks in

[@fille20200]

@@RipleySawzen Dual Chain Sawds

[@jeroeno1]

2.55 Nice tape recorder unit. Seems like a Revox B77

[@bellalkhan9797]

How amazing

[@gshockbabe6144]

Brave men who face death at every moment.I salute you all.

[@noodles169]

Make sure your teeth are in good shape at depths like this. Something like a filling can explode an cause severe agony, with you being stuck in an atmospheric chamber for weeks

[@jacobvieira1338]

Whos cares, the money this job pays he can buy a whole new mouth of pearly whites

[@GideonWallace]

Good to know...

[@oliversparks1459]

FIRST Time to See This Was Over at Subsea at the Time Always Knew about this Comex Dive First Footage I've Ever Seen

[@matthewcody1757]

Great Model D sound trax.

[@saltyfry8688]

Awesome!

[@TheFend3r]

17 day Deco...... wow

[@oddworld9000]

Anyone one here from COMEX ? I mean divers, and what is a Bell-Out, or do they mean Bailout! The 47 was copied from my upgraded superlight b in 1998, COMEX equipment is not a rip-off of KM, if you have used this kit you would know the difference . Oh and yes I worked for COMEX , Oceanerring , McDermotts etc, Great vid as not much footage about, Thanks for uploading

[@Chad-Giga.]

This is no different than working outside the space station

[@derekwall200]

534 meters is 1751 feet (just over 1/4 of a mile) where the pressure would be around 792 PSI.

[@derekwall200]

@James Sloan and that's on every square inch of your body. So take 778 PSI and multiply that by the number of square inches on your body (whatever that number May be) will feel like you're being crushed by a hydraulic press

[@burants89]

At 520 metres deep no one can hear you scream

[@teddymills1]

Saturation divers are like Special Forces guys that happen to work in the deep ocean.

[@BobGardiner]

I would be interested to know what bail-out system they used.

[@realitywithmj4334]

this was at the same time as the war games movie. wow that technology is so incredible

[@MegaBoilermaker]

This can be misleading, the mixture is a Tri-mIx.

[@whatsmyname1288]

Wow, balls of steel

[@Ronbo710]

Comex ruled.

[@critstixdarkspear5375]

With how this was commentated I was expecting the company to be called ACME and have the only casualty being one Mr Wile E. Coyote.

[@chrisbouris3699]

- 701 meters at HydraX

[@DanielLopez-up6os]

Geebus 534 Meeters, i thought 100 meters was already Awesome!

[@MrTNBassmaster]

I went this deep once in a snowcone.

[@kraftwurx_Aviation]

Here, inhale this explosive mixture of hydrogen and Oxygen 😮

[@ruuvari123]

Is it because of high pressure that only 1% of oxygen is needed? I understand ill efects of certain or should I say most of the gases if their partial pressure increases but that is little bit unclear how body is able to absorb enough oxygen from such low content.

[@flugschulerfluglehrer7139]

ruuvari123 The answer is in you question. What counts is the partial pressure of oxygen. The human body need a partial oxygen pressure between 0.12 and 1.6 bar to survive. At 500 meters below salt water the total pressure is roughly 50 bar. At 1 % oxygen content its patrial pressure is 0.5 bar. This would correspond to a 50 % Oxigene content at surface pressure, so by far enough to breath.

[@dylanberry8679]

What are the side affects on the body being under all that pressure and breathing those gases for such long periods of time?

[@candykanefpv98]

Huge reduction in red blood cells. When they come back out they get major headaches.

[@Coffeeguyzz]

I was involved in the Predictive Study IV project in Philadelphia in 1975 where we went down to 1,600 feet (storage depth was 1,200). There has never been any physiological effects from that dive and - excepting very daunting logistics - those depths had remarkably little distinction from any underwater work whatsoever. 30 feet to 800 feet in working dives or 1,600 feet in that experiment ... not really much difference.

[@Fluxburner]

If you do saturation long enough the most noticeable effect is it eventually gives you short term memory problems, and causes a type of disconnection of concentration within the brain. It is hard to describe no one talks about it, it is not even documented or researched, or frankly, even admitted by many divers themselves, that they even experience these symptoms, but it is there. It is suttle, and the effects very gradual over time. However when you stop going into saturation for a period longer than a year or 2 the symptoms diminish somewhat and the brain memory function improves, do I think it causes irreversible damage , yes I do, will anyone admit it, no they won't as it would negatively affect the oil and gas industry on a global scale.

[@stevenfoxworth1755]

dangerous shit... but big money..

[@dobiem1]

Mr uploader. Can you confirm if this is true? 701 metres (2,300 ft) Comex Hydra X (Hydra 10) simulated dive in an onshore hyperbaric chamber by Theo Mavrostomos on 20 November 1992. I guess it doesn't count as it was onshore........ ?

[@Coffeeguyzz]

You are correct. The 1992 dive was pressurized in a facility wheras the one in the posted video was an actual, open water dive.

[@erfho8y]

The world record is 701 meters deep.

[@Setnja92]

Holy shit? It is true? :-O Apparently yes: "So how deep can we dive? In 1992 Comex, a French diving company, conducted a series of experimental dives to 2,133 feet (650 meters) of seawater in a hyperbaric research chamber in France. For two hours one diver went to 2,300 feet (701 meters), which is the deepest a human has gone under pressure (71.1 atmospheres) to date." This is crazy. www.alertdiver.com/Saturation_Diving

[@JoseyWales93]

@@Setnja92 It was *a simulated dive,* Theo Mavrostomos did not go underwater, he remained in a chamber where the pressure was raised to 7.1MPa (71 atmospheres). So the deepest open water dive is 534m.

[@saltMagic]

So i guess you breath is flammable

[@HuckleberryMoon]

If you like this then I HIGHLY recommend reading “Sea Lab” by Ben Hellwarth.

[@hoodlumchronicles7648]

Dude the technology looks so bogus back then lol. Kinda hard to believe anyone did anything back then, shoot even land on the moon. Still mad respect to all these men

[@GiDD504]

1. Lots of accidents happened and 5-10 guys died a year back then. 2. We landed on the moon. The atmosphere of the moon is nothing compared to what these guys go through. 51.7x less pressure than down there.

[@oscarmuffin4322]

Hydrogen and oxygen mixture, what could possibly go wrong?

[@Keys879]

I'm sure no one was allowed a pack of smokes!

[@oscarmuffin4322]

@@Keys879 To be fair I think they replace the helium with hydrogen at a depth where the mixture wouldn't be combustible. I think it's something like

[@brianconroy7514]

@@oscarmuffin4322 its 1 %oxygen

[@un_civilized]

I wonder if this could be used for diving without an air bell. Like competitive deep diving

[@fertoferto9568]

The air suply is the problem i think

[@davesmith8957]

How thick is the dive suit ? How thick are the souls of the boots ?

[@henerymag]

If you are thinking of warmth the suits have warm water that is circulated through them.

[@Coffeeguyzz]

That warmth factor is seldom mentioned but it is a hypercritical component at these depths. Breathing a high heliox mix in the wet transfers body heat something like 35 times faster than breathing air in the dry. Those suits have warm water constantly flowing through them and they need to work properly 100% of the time.

[@xbfalcon83]

2:10 Inspiration and expiration?

[@roypatterson9910]

Shit, this is crazy! The deepest I've been is 30.48 meters, which was at the bottom of a rock quarry on the one side, the other side is 140 ft deep. The water was crystal clear!

[@unemployedgringo]

Shut up, idiot

[@rubikfan1]

I wonder why they never continued with this? Is it because of flamability? Because helium is getting more and more expensif. And sure rebreather fix some of it. But diving this deep sounds awsome

[@70lulatsch]

I think the commercial need for it is missing. Robotics got better and better and are needed anyway for the even deeper jobs. So its not really worth anymore to put human divers to the absolute limit and taking all the risks and costs involved with that.

[@madcarew.3256]

Never put into practise...Too many worries about all that Hydrogen in an offshore field..R.E. Graff Zeppelin!!! and ROVs got better with no deco.

[@DerKrawallkeks]

With the Apollo 1 fire in mind, I'm wondering what the dangers of fire are in a hydrogen-oxygen environment at 53bars..

[@fisterB]

I understand the oxygen content i these tests were 0.8% so it is considered non-explosive.

[@DerKrawallkeks]

@@fisterB ah that makes sense, I did not think of that. Thanks!

[@widget3672]

17 days just to decompress?! That's over 2 weeks of just waiting to leave... I realise they are using Hydrogen and Oxygen in this saturation mix, not sure it's used anymore, last I checked they use Nitox (Nitrogen and oxygen or helium and oxygen (Heliox) because they are gases that can be safely mixed with oxygen without risking harm to human health and it can be less dense, and so better compressed for greater longevity using standard air tanks than a standard air mix.) I like the term given to them... Aquanauts...

[@andrewpast1959]

Widget Nitox is not something you want to use when going deeper then 100 ft. The hydrogen helium and oxygen mix only has 1% oxygen not able to combust.

[@widget3672]

Andrew past alright, I'll admit I'm not formally trained in any of this, I just remember when searching for scuba training that there was a separate course for using Nitox instead of a normal air mix (which I realise is going to be different for saturation diving - I guess I was curious about the pressure problem, as presented in the documentary, but still I'm only just looking into it.) Thanks for de correction.

[@astrowanabe]

Going from surface down, you can actually use pure oxygen for about 20 feet. Most recreational diving uses standard compressed air (78% nitrogen, 21% oxygen, plus other trace gasses) however eventually you will run into Nitrogen Narcosis (you essentially get drunk on Nitrogen) when the partial pressure of Nitrogen in the mix gets too high for the depth. Nitrox, which is standard air that is enriched with extra oxygen to replace some of the nitrogen (usually 28 to 32% oxygen instead of the usual 21% in air), is only used to slow the uptake of nitrogen in depths where you would typically use air to reduce the risk of getting the bends. This extends how long you can stay on the bottom or reduces off-gassing safety times between dives. It is not used for going deeper than you would with air because in addition to the threat of Nitrogen Narcosis you also have to contend with having to much oxygen at those pressures, as the toxicity of the oxygen will cause Central Nervous System issues like unpredictable seizures. To go deep you have to displace the gasses in your mix with something else. That's where Trimix comes in, which is a mixture of nitrogen, helium, and oxygen. The nitrogen is cheap and helium is expensive so divers will continue to use some nitrogen, but just not as much as in regular air. Companies that can afford the cost can use Heliox, which is just helium and oxygen, but too much helium can lead to High Pressure Nervous Syndrome so even then Trimix might be used to reduce the amount of helium. In this video they were using a mix apparently called Hydreliox which is not common. Wiki claims the mix was 49% hydrogen, 50.2% helium, and 0.8% oxygen. This allows ultra-deep diving where even some nitrogen is too much, but something still has to be used to displace some of the hydrogen. Basically, each time one of the gasses tries to kill you you have to displace it with something else - until that gas also tries to kill you. This is why most recreational divers stick to standard air or nitrox. Going any deeper quickly gets more complex and expensive at what seems like an exponential rate. -Just an occasional recreational / Nitrox diver so some of the deep stuff is probably wrong. Hope this helps your curiosity.

[@widget3672]

Phillip Dingus thanks for clearing that up. I'm going on my fist dives in just under a month and while I've studied the whole marine ecology side of things pretty well, I'm actually still very new to diving and I figure it helps to know of the nuances so at least there's nothing unexpected, no panic.

[@MrKinir]

To be fair, very few people in the world are trained for Hydreliox usage; it's very uncommon, as far as I know. -Nitrox on the other hand is semi common with medium/advanced level recreational divers. Even PADI offers that certification, if you meet the requirements for safe usage. -Trimix (Helium/nitrogen/oxygen), is also used by advanced/technical/deep recreational divers, but because of cost, complexity and risk, this is an advanced certification. As a beginner diver, you're 100% fine with good old air :) (Provided you're within the safety margin obviously)

[@danmclaughlin1180]

Imagine the hangover after living at those depths and breathing hydrogen mix. No thanks.

[@johndoe-ee7ko]

Amazing I cant go deeper than 30 m withouth getting nosebleeds :(

[@dripchavez9209]

I’m going into union welding soon and want to further my career into deep sea welding any advice on anything from regular to deep sea welding what contents etc states anything where is all the big money at ? I know you have to be certified in everything there is to learn and big money depends on the work and project but where do you go to find these big jobs ?i know it also takes years of experience

[@dive_like_grinch]

If you just start to think about that then research all buisnes mate, as I left this kinde of diving the buisnes was down and so many divers were with out a job. So be careful mate

[@jonbar3842]

listen to legends man. if you still want to do it then fuck welding schools, they teach you that in dive school. Santa Barbara City College is has the cheapest and in my opinion the best dive school.

[@AG.Floats]

Become a commercial diver first and keep at that for a long while. Then do sat training then get lucky.

[@a2thee270]

Get your commercial divers card. Skip the union and search COmmercial diving academy, Jacksonville florida I'm looking into right now. It is 25k for the 3 month class. They teach you welding and cutting and rigging. You can get hired at a naval ship yard making almost 80k your first year. Or work.on the oil rigs in the gulf $$$$$$$$$$. Fuck the unions, they protect the lazy. Let your skills speak for themselves!!!!!

[@jacobshepherd3997]

A2theE2 CDA is a joke

[@sparklessconnectionselectrical]

Only 1% oxygen?

[@jamesonaudette528]

Is it possible to dive deeper than this? It seems like it’s possible, the limiting factor however is the decompression.

[@arcticflower1760]

There is also the problem of being saturated by nitrogen, that can make you go crazy, which is very dangerous at such a depth. They can replace the nitrogen with other gases, but eventually they also get problematic. So they end up using hydrogen with 1% of oxygen. And it's problematic for obvious reason 💣😂 who knows what kind of gas mixture would you have to use diving deeper than this

[@Plutokta]

COMEX tested the concept to up to 700m (onshore simulation). The problem is that at some point, even hydrogen becomes too viscous to breath efficiently.

[@raffaeledivora9517]

​@@arcticflower1760Actually it's not problematic at all, hydrogen at that low oxygen pressure cannot combust, let alone detonate

[@70lulatsch]

@@raffaeledivora9517 The breathing mix is not dangerous. But you need to handle the hydrogen safely on the ship. That increases the complexity and cost of the operation. And thats the reason why it is not done anymore today.

[@justgjt]

Are any of these guys still alive ?

[@astmo]

20.000 Leagues Under the Sea!

[@jedisdad2265]

NASA actually set up an underwater lab in the Florida Keys to test Astronauts. AND in Houston Texas Astronauts train for EVA’s using a large swimming pool at Ellington Field. Of course the Astronauts don’t get close to these depths nor do they need to learn the physics of the mixed gas diving

[@alexander111189]

All of those people had big health problems after. The government didn’t tell them what damage would follow after diving that deep. Try to find any of them old with no psychical problems!

[@risalbrodin422]

KRI nanggala 402 Submarine sinks 839m is broken 3 side

[@MrBigBoy4Life]

That’s 1751ft!!!

[@americathefree3708]

My deepest was 330' on heliox. Damn good money! never did sat.😒

[@MyScubasteve]

Utter crap thats 100 metres and its done on trimix at that depth.

[@downlink5877]

@@MyScubasteve 'Trimix' is not used commercially, and a 330' surface mixed gas dive offshore commercially is not unheard of. The US Navy's own procedures for surface gas stop just short at 300'. Don't go around correcting people in the comments sections when you have no clue what you are talking about.

[@MyScubasteve]

@@downlink5877 I am a BSAC Sports Mixed Gas Diver and PADI DM. My comment was no one uses Heliox to do a 100m dive. You use trimix and it is used commercially as that is what is was designed for.

[@downlink5877]

@@MyScubasteve BSAC is utterly meaningless in the commercial world, as is PADI. Heliox is used both for deep surface and saturation diving commercially, though the former is only done in a few jurisdictions these days: the US Gulf of Mexico being one of them. Trimix is not used by commercial diving companies. This is my industry, and I am second-generation in it. Once again, refrain from commenting on that which you have demonstrated you have no professional background in.

[@guydavid8656]

All my respect for y'all .... I am not doing Saturation diving .... Why is it there is only about a 4-5 year dive lifetime for a diver doing saturation diving ??

[@FokkerAce1917]

Guy David The pressure wrecks your body. It takes years off your life

[@Coffeeguyzz]

Good question. I did commercial diving for 8 years back in the '70s. Work included a 1,600 footer in the Predictive Studies IV project, 3 years offshore rigs worldwide, and 4 years harbor work throughout US, mainly out of NYC. It can be a great career for a fit, single young man, but the pay can be less than what u might expect. The constant travel, job uncertainty and - most of all as time goes by - the danger start to make one question their long term prospects. You will NEVER see the "near misses" that occur in this work, but they are most certainly there. Best info I would pass on to someone starting out in life is to get involved in a skilled trade. Great pay and long term demand are the norm. Good luck.

[@downlink5877]

That's not really true. Many of the core North Sea sat divers have been doing it for 20 years.

[@leprechaunbutreallyjustamidget]

OK so why not take this technology and apply it to manned submersibles you would be able to dive deeper with the same hull if you pressurized the internal atmosphere

[@samihawasli7408]

Living in an atmosphere which is 100% combustible? Hydrogen and oxygen? Sounds fun

[@raffaeledivora9517]

Not combustible at all below 5% oxygen. You could enter with a flamethrower and nothing would happen

[@johnnyboy1586]

How do they handle the pressure on there bodies?

[@arcticflower1760]

They don't feel anything :) it's kind of a myth that you feel the weight of water on you, even on such a extreme depth. Because the body really doesn't care. It cannot be squeezed, because it's made out of water and solid matter. The only problem is with the air that's in the body. That's why they use the compression chamber. To equalize the pressures. As long as they are equal they are fine.

[@Antarath]

Boyles law only applies to gases.

[@jagersilva2169]

are we all ganna ignore their allience to hydra?

[@raffaeledivora9517]

Hail Hydra! 500m under the sea, just off the coast of Marseille, the next generation of the organization survives undetected in a hidden facility and prepares, as usual, to take over the world

[@yvindwyller7929]

How deep is your love?

[@xXCdOg24Xx]

Diving must’ve been rough for the first few guys who got the Benz

[@jimmydcricket5893]

Few?

[@samdilworth1989]

That is almost 600 yards under water.

[@makismakiavelis5718]

Sure, you eliminated the High-pressure Nervous Syndrome but if you still use 50% He in the mixture the Silly Voice Hilarious Syndrome will still be a serious threat for the divers. But seriously though, how can they survive with only 1% oxygen in the mixture? If the oxygen percentage in the mixture is too low, they suffocate. If it's too high it makes the hydrogen combust. I am confused, how does it work?

[@ChaosTheory666]

Makis Makiavelis I'm guessing it works due to the amount of oxygen is fine due to how compressed it is. Any more and they'd likely die from oxygen poisoning. Just guessing though.

[@benmac7315]

It is called a hypoxic mix, it would be insufficient oxygen to support life at the surface but due to the increased pressure at that depth the about of oxygen the diver is breathing would be about the same as breathing 50% oxygen at the surface. The body requires a given amount of oxygen not a certain ratio in the air we breathe. That amount in diving terms is measured in partial pressure and is between about .16bar and 1.6 bar too much or too little you die. For an explosion you need a certain ratio of gas to oxygen I'm unsure what it is for hydrogen but I'd guess between 10 and 90% hydrogen out side of those ranges the ratio is considered inert as it is either too rich or too lean a mix to do anything. However they would have to be very careful when decompressing the divers as it would just about have to go through that range.

[@TheNicky9905]

+Ben Mac, Thanks for that explanation Ben, I understand this now

[@ChaosTheory666]

Bogy 1 Kinoby Really? en.wikipedia.org/wiki/Oxygen_toxicity

[@ChaosTheory666]

Bogy 1 Kinoby Isn't he basically saying the same though?

[@alex29443]

hydrogen and oxygen.... sounds safe. Seriously, compared to this, space travel must be a dawdle.

[@kilobravo2373]

Yup. Other than that whole "strapped to a god damned missile that uses highly explosive, chemically reacting, boom juices as propellants - at a rate of ton(s) per second. All parts of which are built by the lowest bidder, for a government organization instead of private enterprise with politicians and budget constraints weighing in on every design consideration from concept to completion". Hope you get lucky and become an astronaut when the funding wasn't being reduced to pay for sanctuary cities or minorities to ween off the ole' government teet.... Lets also not forget that they still don't exactly know what happens to a human body if exposed to the vacuum of space, as its purely a guess and the opinions vary. Not to mention the return ride being equally as much of a nightmarish chain of events that could and has gone completely awry... Oh, and astronauts almost always are either: a post doctoral subject matter expert, and/or having spent about a decade as a test pilot flying dicey and unproven aircraft on the edge of their performance envelope following a decorated career as a military pilot. Not to mention a proven track record of being a leader of large groups completing difficult tasks.. Apples to oranges, bud. Needless to say, divers are beasts amongst men, but lets not get swooped up by one silly video and forget exactly what leaving the planet all entails. Also, divers get food through an airlock, and astronauts eat what they were able to turn into paste and bring along with them.... Just saying...

[@myamdane6895]

@@kilobravo2373 Damn dude that was a hell of a read

[@schmedlywhiplash6267]

Ok people here goes all the answers to the posts! No this isn't the record,was at the time back in 80s. And for all the wanna be commercial divers do it,but plan with caution and listen to those who been there! And mixed gas is perfectly safe as long as decompression tables are followed.....Dive on!

[@VashStarwind]

How are their lungs not instantly crushed? Does the whole suit have pressure being pumped into it or what?

[@arcticflower1760]

The compression chamber makes the pressures inside and outside the body equal for that depth, so they cannot be crushed

[@stanjavorsky7151]

How did they withstand the pressure its crazy

[@khanch.6807]

By equalising the pressure. The air mix in their body cavity and diving gear is way above atmospheric.

[@Sergeant1990]

If I search for the worlds deepest dive I only come on 332.35M and they dive on 534m?

[@rakerholm]

the 332m dive is a recreational dive. The one in the video is commercial diving. That´s something completely different.

[@rd468magnum]

If the guy in the bell were to jump into water really quick and swim around with no mask or tank..would pressure crushed him..no.. but he would feel it.

[@Fluxburner]

No , the bellman is at the same depth as the divers, and is saturated to that water depth, It is no different than him doing it at 10 meters since he is equalised to the current pressure at that depth which is around 54 bar, since we are composed of mostly water as well when saturated you are at equilibrium with the exposure depth.

[@geraldwilson681]

534 meters is deep!!!😬