Thank you so much for making these videos. Your combined perspective as an expedition technical diver and anesthesiologist gives you a unique ability to articulate this better than anyone else.
@beeka739 ай бұрын
Thanks Richard, this should be in every instructors “share” list with OW students!
@matthewsavage34922 жыл бұрын
Hi Harry, great to see there is going to be some regular content coming. Interested in a video on your thoughts regarding cut-off valves in CCR equipment which has been topical lately, either in manual add valves or in offboard connections. Do you use them and why? Hope you can get back across the ditch and into the Pearse soon.
@norbertosalazarzagaglia621611 ай бұрын
G´DAY HARRY!!! great master class. Thanks a lot for this video and just runing to watch the par 2. A great honor to see you in Covanera- Pozo azul
@DrHarryH11 ай бұрын
Thanks Berto! Good to hear from you! Did you guys end up buying the Argolamps?
@norbertosalazarzagaglia621611 ай бұрын
Hi Harry; I am not Berto; just crossed a word on August 23erd while helping to carry @@DrHarryH a couple of cylinders.Thanks for the answer any way
@adobahala2 жыл бұрын
Great video. I am thai newbie scuba diving for this kind of sport and will love to see more your video. 👍👍
@harryclark28352 жыл бұрын
Great video, looking forward to more in the series!!
@ubuntuscorpious2 жыл бұрын
Bloody great stuff. Looking forward to more content like this!
@DrHarryH2 жыл бұрын
More to come!
@madrx22 жыл бұрын
Loving the videos and the know how! Could listen to you all day. Saw you on television earlier today and was told the wife " hey there's Richard I know him!" She said " how do you know him?!?," I told her I followed you on KZbin, she proceeded to throw a pillow at me and tell me I'm an idiot. Lol
@DrHarryH2 жыл бұрын
Ah she went to the same school of wife-ing as mine!
@danflaherty11322 жыл бұрын
First time to your channel, Harry, and admired the way your present a complex topic in easy-to-understand terms. Well done and I am on to the next video!
@bluechips25662 жыл бұрын
Awesome and very informative video. Amazing. Thank you for sharing your knowledge!
@mavenmavenpest17502 жыл бұрын
Another great video - thanks.
@DrHarryH2 жыл бұрын
Glad you enjoyed it
@ardentpyro22 жыл бұрын
Richard thank you for these videos they are wonderful, you are an inspriation in diving and as a person. Please make more content :)
@paularbon10932 жыл бұрын
Thanks Harry for another great video. You have a nice looking compressor set up there.
@DrHarryH2 жыл бұрын
Cheers Paul!
@Chogogo7172 жыл бұрын
Great to review!
@ngobmx2 жыл бұрын
This was super helpful. Are you guys planning any deep cave dives for this year? It's fantastic to see the difference dives going on!
@DrHarryH2 жыл бұрын
Quiet year I'm afraid :-(
@scottinnes73762 жыл бұрын
Superb!! Lots more please!!👍🏻👍🏻
@alexfinn79892 жыл бұрын
really great video! Looking forward to Part 2!
@markusleitner37352 жыл бұрын
Super video! I hope to get more content from you! I am on the beginning of my Kiss Classic Training under ISE, and like your MEG in double config a lot. After your dive talk Interview, I would really like to see more of your explorations!Keep it up. Best regards from Austria!
@DrHarryH2 жыл бұрын
Thankyou Markus!
@ratcookie1232 жыл бұрын
I really appreciate these videos, for someone who's searching for a life interest i for the first time found gaining knowledge very interesting and almost like i could see a future in this type of activitie
@jaimieboy9992 жыл бұрын
Go for it mate 👌👌
@ketanmhatre67092 жыл бұрын
Sir , i had a doubt .. in a fish aquarium when we use a air pump does it directly dissolves oxygen in the water as it pumps air in the aquarium or it just agitates the water and the oxygen from atmosphere dissolves in the water from the surface .. ??
@DrHarryH2 жыл бұрын
Both I guess!
@ketanmhatre67092 жыл бұрын
thank you Sir .. for your reply ..
@larlario289 Жыл бұрын
would increasing respiratory rate during safety stop be beneficial with respect to off gassing excess nitrogen?
@DrHarryH Жыл бұрын
Hi it's a good thought but not really. Respiration is not the limiting factor in clearing the inert gas from your body. It depends more on liberating it from the tissues and getting it back to the lungs. That's why gentle exercise during decompression stops may improve the efficiency of deco. Emphasis on gentle because excessive exercise increases bubbling!
@cmpe432 жыл бұрын
In a close loop, do you need to add gas at the extreme depths you hang out at and does your system automatically bleed the extra gas if you add?
@DrHarryH2 жыл бұрын
Yes and yes! As you descend the loop gets squashed so more gas must be added. On the way up, the reverse occurs. The main gas being added to deal with the pressure change is called the 'diluent'.
@johannmattis48425 ай бұрын
So it arises that there is an absolute limit of diving with lungs and gases which is around 300m? What about hydrogen then?
@wezzuh24823 ай бұрын
Exactly why hydrogen may be employed. The deepest dive record was to 534 meters and it employed 1% O2 and 99% hydrogen for this reason. At that point, even using Hydrogen pushes the envelope on density.
@elmo3192 жыл бұрын
A great explanation. New sub, rec diver interested in tec. So Sheck Exley must have used at a 10% O2 in order to do those deep dives to 120m on just air, so 0.1 x 13 atm equals ppO2 of 1.3. Because at 21% it would have been 2.73 ppO2, which I never could understand until I watched this video. I still don’t understand why he didn’t get narcked though 🤔
@mattiashenning77172 жыл бұрын
He used substituted a majority of the nitrogen for helium which is not narcotic. It also has a lower density which makes it easier to breathe at depth.
@elmo3192 жыл бұрын
@@mattiashenning7717 - he completed the dives on compressed air, not trimix
@niallmacleod1024 Жыл бұрын
I haven't read any of Shecks books for many years, but I do recall him writing about his deep air dives. Don't forget that (for simplicity) air is defined as 21% O2 and 79% N2. Anything other than that then it’s not air - its Nitrox (assuming only O2 and N2 are mixed). 10% Nitrox would not have been used as it’s a very poor choice of gas. Its more narcotic than air, hypoxic at the surface and comes with a higher decompression penalty. WOB etc. still factors. So, he ran those dives on air which means he exceeded recommended pp02 limits. The 1.6 ppO2 re limit is there for good reason. Sure, people have exceeded it - look at Bret Gilliam's deep air dives as another example. I am not judging here btw, in the mid 90’s my DM buddies and I would regularly hit 2.0 wall diving in the Caribbean. Not condoning that at all.... I blame access to Navy Tables and patronizing Skin Diver magazine articles! I would argue that he would have been narked. Narcosis is a physiological certainty. His long-term exposure, physiology, and the water environment all play a part - and so its effect on him may have been less pronounced - or perhaps more accurately, his ability to work around it may have been more refined.
@sindred35302 жыл бұрын
Is only Oxygen, Nitrogen, Helium & Hydrogen used for deep diving? Why aren´t Neon or Argon used for example to reduce narcosis?
@DrHarryH2 жыл бұрын
In reality only O2, N2 and helium are used. Hydrogen is an experimental diving gas with many practical and theoretical concerns. Argon is used in drysuit inflation as it has good thermal properties, but it is highly narcotic and also very dense so no good for deep diving. Other exotic gases like xenon are so narcotic they can be used as anaesthetics!