Scuba Diving for Beginners - Understanding Atmospheres Underwater is Easy

[@patrickscohy3053]

I've always loved the balloon example! :-) Useful video about the basics to help beginners understand why you never hold your breath when breathing compressed air under water. Thanks for this video Chris!

[@ricardomontalban6004]

What colour balloon are you?

[@zdodops8490]

Ricardo montalban what

[@rooftoprumble7845]

I don't understand tho how freestyle divers don't cause damage tho

[@shamaafrin4031]

@@rooftoprumble7845 xD well you should look what they do before free diving . They do some decompression stuff for hours above sea before free diving .

[@KosmicKoheiAspiringAstronaut]

I am working towards my Master diver and I can attest that this was a really good breakdown!

[@JackieChinJR]

Am fully aware of the rule of thumb, just wondering how it works for freedivers tho? I understand that holding one breath for minutes probably won’t subject freedivers to decom or bent but in terms of atmospheric pressure its inevitable right?World record free divers went like over 200m holding their breaths... Thats over 20 atm compare to recreational scuba divers at 40m! The lungs are gonna shrink to less than 5% volume!

[@Yggdrasil42]

Yes that's exactly what happens. In fact, some blood plasma even enters the lungs at such depths, then gets reabsorbed on the ascent.

[@ricardomontalban6004]

If you ascend with full lungs surely the expansion makes it escape out your face holes? It must actually take quite a conscious effort to hold your oesophagus closed against the pressure I would have thought. When I freedive exhaling on the way up is a really nice part of the dive( warmest too) that has always been instinctual with me.

[@Yggdrasil42]

Ricardo montalban Since people do actually get barotrauma you can empirically conclude that it doesn't automatically happen to everyone. Best not to count on it but train people so it becomes second nature.

[@ricardomontalban6004]

I’m gonna need to cross examine those people, I think they liars lol

[@JohnJones-iq7uj]

so people have died from holding their breath at depth and ascending to the surface. The most common cause is panic. The expanding air escapes from the lungs, and into the blood stream, causing an arterial gas embolism. Yes, it does require effort to hold your breath, but it does happen, and people have died from it, which is why divers are taught to never hold your breath.

[@seikibrian8641]

@@ricardomontalban6004 You're not a respiratory therapist, are you? A diver medical technician? A hyperbaric chamber operator? Are you even a certified diver? If you say yes to any of the above, I will think you are a liar.

[@SouthBayEngr]

You might want to clarify what you mean by density. Density of water does not increase with depth. It remains constant (62.4lb/ft^3).

[@bobobobobobs]

But why? I have a question if anybody could answer it would be nice. When you take the balloon down the water the high pressure forces the surface of the balloon to shrink when sinking and expand on the way up because its pushing literally on the surface of the balloon, but aren't our lungs in our chest? like surrounded with bones, why does it change volume when going up or down? Do the actual ribs contract that much so they push on lungs? What if I put a balloon in a sealed glass bottle and did this experiment, would the same thing happen?

[@Yggdrasil42]

Bobb S It really does happen. A freediver holding their breath will have their lungs compress during a dive, though not completely. The lung tissue strengthens by filling with blood when under pressure, resisting the compression a bit. But your rib cage is quite flexible, not the ribs but the cartilage that connect them, which you'll notice when breathing or if you've ever seen CPR being performed. Also, your chest contains more than your lungs. Only the air compresses, the tissues and fluids do not. This means your chest cavity doesnt have to compress enough to cause damage. If you tried this with a balloon in a glass is or metal bottle the balloon would stay the same size since the pressure in the bottle won't change.

[@JohnJones-iq7uj]

so to answer your question, your lungs are surrounded by bone and tissue and meat and what not, but your lungs can become compressed because it's not the lung itself that's compressing. It's the air inside your lungs that is. That is the relationship between pressure from your depth under the water, and specifically air. The deeper you go, the more compressed the air becomes. It's also why a scuba tank doesn't last as long at 50 feet as it does at the surface, because the air inside the tank has been compressed and the volume has changed. Does this help to answer your question?

[@seikibrian8641]

*Bobb S* "...aren't our lungs in our chest? like surrounded with bones, why does it change volume when going up or down? Do the actual ribs contract that much so they push on lungs?" You can answer your own question by looking at your chest as you breath in and out. Your chest expands and contracts, and the volume of the "thoracic cavity" changes with it. Increasing water pressure squeezes the chest, which is why you can't just inhale underwater through a long hose; anything longer than a foot or so (the length of a snorkel) would be impossible to inhale through because of the squeeze.

[@aslanhaikal4509]

But scuba tanks is solid cylinder.uncompressable unlike a ballons.. how the out side pressure affects the gas inside the scuba tank?

[@thingz9524]

Traxxas muhamad there referring to your lungs

[@seikibrian8641]

Scuba cylinders are not completely non-compressible. Aluminum changes shape more-so than steel, but both are compressed slightly by depth. (And both expand slightly when being filled; you can measure the change before and after filling with a tape measure.) However the point of this video was how pressure changes affect the body, and why scuba divers need regulators to control the pressure of the compressed air to match the pressure of the ambient water at different depths.

[@Yggdrasil42]

It doesn't really affect cylinders because they're basically uncompressable. If they're strong enough to keep 200 bar in, they can keep 5 bar out.

[@kaneda956]

Is it safe to use a small tank while diving about 10 to 12 feet? There is a bay close by i wanna go diving in. I snorkel but wanna stay under longer.

[@erikhillblaske]

What about free diving though? Is it bad for you?

[@derangedtortoise909]

No

[@widget3672]

Atmospheres also increase by 1 per ~10 meters

[@turtles3808]

Widget "Bar"

[@widget3672]

Neatsp also correct. Unless you use psi, then you can get out.

[@doctortitan873]

Widget psi is more exact

[@widget3672]

@@doctortitan873 more numbers doesn't make it easier to communicate. There's one hand signal for 100 bar and one finger for 10 bar. If you're trying to justify using psi, you're trying to justify the imperial system - something only a few countries use because they can't be bothered to learn the metric system.

[@doctortitan873]

Widget I'm canadian and normally use the metric system but for some odd reason I prefer the imperial system when diving. Idk why but that is just my personal preference

[@dewinchy]

You didn't explain some important things for the understanding though. The pressure only happens to gases, like air in our lungs, but also air in our ears, our paranasal sinus cavities but also small air bubbles in our teeth. The rest of our body is water and water won't be compressed. Pressure only works on gases in flexible containments, like our body. So if you had a metal casing, the metal casing would have to bear up against the pressure. But our bodies aren't metal casings.

[@FroggypondVideos]

Idk about you about but this something isnt what i worry about because i have learned to stay strong and be tough and be better and be better diving!

[@jordabox]

Love the bikini bottom soundtrack

[@scorcher46]

Why am I watching this when I’m just going to try out my DIY skuba pool in my pool

[@KosmicKoheiAspiringAstronaut]

All knowledge is good knowledge. Even for scuba pools 👍.

[@ChristinaLoizeau]

I want to learn the work because my dream is for this

[@rooftoprumble7845]

Can someone explain why freestyle divers don't cause damage to their lungs?

[@spike_-pw9iz]

I believe they release air to fix the pressure problem maybe? Idfk im not a diver LOL

[@mtbfullon7162]

I’m a diver and I don’t know but I’m not dead yet lol 😂

[@KosmicKoheiAspiringAstronaut]

They use very specific techniques that involve heading up to the surface slowly, so that the body can become accustomed to the pressure change. Hope that helps!

[@allylondon9579]

What is the volume she is talking about?

[@tidybananas3954]

What if you only go like 5 ft

[@AlminNesimi]

thats snorkeling xD

[@thingz9524]

Almin Nesimi show me a someone using a five ft snorkel and I’ll show you someone with lungs stronger than the hulk

[@biggary1238]

Lmaoooo a five foot snorkel

[@Mike-ck3wi]

Good info, but please please adjust the volume or hire a new sound designer. So quiet.

[@user-rl5ph2hr1i]

Mike it was relatively loud. you might need a new headset or speaker

[@cameron6797]

Turn...up...your...volume?🙄

[@MsRoshniAli]

Thank you

[@theepicgameplayer4555]

There is no one in these ocean depths so don't hold your breath

[@Man0fMeans]

Anyone else think the thumbnail image had ta-tas?

Volume argument is crap because your body does not change volume so drastically when you descend. Your lungs are not 1/5th of their size at 132ft - they're 20% as efficient as at sea level because of increased pressure. That is all assuming your muscles are able to get the ribcage open to the same level.

[@mattblack133]

What if i cant fart? Seriously... what if i have gas ?????😢

[@mystic2970]

you should have more subscribers

[@OscarEcho]

this background music help you to release the old shit inside ur stomach 😮

[@uniworkhorse]

🤔 our example diver's mask doesn't cover his nose smh

[@nanayinday12]

POV: you're watching this bcoz your teacher wants u to watch it!

[@jmkim4213]

PRESENT - ONLINE CLASS ACLC

[@hao-el7pm]

My sister told me that if you go to deep and want to go up the current. you cant suddenly go up the current you have to go up one hour at a time so it takes up to 5h or more if you go to deep.i think if you suddenly go up something will happen to your lungs.😂😂😂

[@tjhaze204]

The bends. Your blood basically boils inside of you due to rapid decompression

[@ricardomontalban6004]

How deep you gotta be for a 5 hour decomp?

[@joeray5394]

@@ricardomontalban6004 20k leagues

[@bumblebee-ml1xo]

Secxfull vadeo

[@dinarmahfuz1445]

U scared me ... had such a negative impact on scuba after watching this video

[@zLukeePs3]

This scared you? Grow up. This is information you need to know before getting anywhere near a scuba dive.

[@JaspervR1111]

Lol pathetic

[@autent5335]

@@JaspervR1111 You are, saying that to someone who is just genuinely scared about doing something like this

[@bearvillebear1468]

Keep strong. Dont forget that despite the evil in this world, God is full of justice, mercy and love. Justice said we broke His perfect law - causing the world's previous perfection to be destroyed - and therefore we deserve Hell (like a punishment in any legal system but this is eternal as His perfect law is eternal too). Don't think you fit in that category? Ever done one of these?: lying, stealing - regardless of how small the object EVER, hating others - which is murder in God's perfect law, lusting (plus God sees our entire thought life). Justice says "the soul that sins shall die". BUT, mercy said "I dont want to give them what they deserve. I don't want them to be cut off from Me. I love them despite all they have done/will do against Me. I want to give My children another chance. I want them to come home and live in My love again". And love said "Jesus, God's Son, came down as a Man, our representative, suffering every temptation, pain and struggle we have ever faced, yet without sin. He took all our sins (past/present/ even future) to the cross and then crucified EVERY ONE on our behalf. Justice was paid on the cross so that we can be free from Hell's punishment, experience Gods mercy of forgiveness of sin and live in His love. If we turn from the sins we have committed and repent (turn away from our sin and pursue the opposite direction of love through Christ) He will, overtime, recreate us back into that previously perfect image through The Holy Spirit which Jesus sends to all who accept Him as their personal Lord and Savior of their life. He is in Heaven right now preparing a place for us so that He can take His faithful, believing children home with Him when He returns. He will ressurrect us from death when He returns, giving mercy to those who accept His love, instruction and teachings in their life, and give justice to those who refuse it. He doesn't want ANY of us to go to Hell and die for continuing in evil and rejecting His way to life, thats why He died FOR us. He wants us to be His and begin to follow His life of love and service through Him (not ourselves as it's impossible without depending on His power and instruction). So long as we keep our hearts near to Christ through His strength, strive to obey His will of perfect love revealed in the Bible, and ask Him to help us in the midst of (very certain) pitfalls and struggles, we will, in time, win the victory over sin, pain and DEATH through Christ. Even if you are willing to be made willing, or struggling or doubtful, simply be honest and tell Him that. He is not intimidated by ANY sin or struggle you are facing. ANY. He hears and will answer. If we pray for Him to come in, regardless of the condition, then He will. NOTE: You are NEVER too sinful or messed up that God cannot turn your life around through Jesus. EVER. If you have any questions let me know X

[@VR46Monster]

First thing is crap. Holding breath is safe when descending.... If it was true.. non freediver would live

[@eminnking6313]

This is not free diving its scuba diving in scuba diving you have to breath whit help of air tank

[@VR46Monster]

@@eminnking6313 even when are you scuba diver -.- You cant hold breath when ascending but you can when descending. Only thing what is stupid. is why would you use freediving technique when you got air tank on back. If you will use this. You will not breath for few minutes without air consumption. But when you will be out of air in lungs. You will consume x times more air from tank cause of the same thing. You will need to take a few deeeeep breaths to get to normal

[@eminnking6313]

+Vít Repa I am freediver and i want to become scubadiver and i watch a lot of this videos to learn some tips about scubadiving. Hope it works

[@marvin6119]

@Darius Valikalari im not a scuber diver but ive gone scuber diving twice. its pretty easy

[@Yggdrasil42]

They're not claiming that part is bad, just explaining how it works. You're right that only the ascent requires you to keep breathing.

[@kpwork1982]

I interesting scuba diving course but I don't have money...

[@newagederpderp]

Did you have a ministroke?

[@westonhuffman7908]

Well, I feel the same way.

[@evonmorgan4487]

What a condescending video. Like being explained by a kinder teacher.