Why is PO2 important for divers? | SCUBA 101

Jonathan explains the concept of PO2 (Oxygen partial Pressure) and how it relates to Maximum Operating Depth (MOD) of a breathing gas, and how rebreathers gain advantage by changing the percentage of oxygen in the breathing loop at different depths to maintain a more ideal PO2 and minimize the amount of nitrogen in the breathing mix. It's not as tricky as it sounds!
WARNING! JONATHAN IS NOT AN INSTRUCTOR AND THIS VIDEO IS FOR ENTERTAINMENT PURPOSES ONLY. ALWAYS SEEK PROFESSIONAL INSTRUCTION FOR SCUBA DIVING.
Other videos that are relevant to this one:
WHAT IS NITROX?
• What is Nitrox? | SCUB...
WHAT IS A REBREATHER
• What is a Rebreather? ...
ADVANTAGES OF REBREATHERS
• What are the Benefits ...
TYPES OF REBREATHERS
• What are the Different...
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[@Dandeb19]

I don't dive but between you, Dive Talk & Edd's videos, I've learned so much. I've learned about safety, open air and rebreather diving. ❤

[@boofy081965]

Jonathan you have explained PO2 better than anyone here on TH-cam I like watching you vids keep em coming from Australia.

[@BrianBarrett]

Very well explained and easy to follow. So much easier than trying to follow it in instruction manuals.

[@alexandremarcelotaddeiramo8958]

Finally someone explained the math behind dive. Great didatics.... thanks master.

[@martinholloway7694]

I’ve looked around for a good video for partial pressure and this is hands down the absolute best.

[@mavica130]

Been diving a long time. Have nitrox ,SCR,advanced OW , etc. This by far is the best explanation for P02 that I've heard 👍🏼

[@boofy081965]

So much easier in meter's then again from Australia thanks Johnathan.

[@willpas1957]

This is a great refresher course for me!!

[@Off-Grid_Divers]

As a newly qualified BSAC OWI that was a brilliantly simple explanation of PO2 👏👍

[@Frankiewizard]

Cheers Mr, it's always much easier in metric. Keep up the good work.

[@Bigntactical1]

Thanks 🙏 this is the best video I ever watched about this topic!

[@rays9033]

I’ve been diving for 45 years. This video is the best PO2/Nitrox mix explanation I’ve ever seen or heard! Great job, and is easy to understand!

[@nicktsikas6780]

Good explanation, just one minor point.

[@meridacavediver]

Probably one of the best videos I’ve ever seen on this topic. Well done.

[@cwilliams6884]

this explanation made me get it, thank you sir!

[@rabukan5842]

Jonathan, this is an excellent presentation/explanation of partial pressures! As a technical instructor/rebreather cave diver, I just wanted to mention that for O/C, we teach P02 limits up to 1.4, not 1.6. We do deco (only technical) at 1.6, but for recreational Nitrox users, I believe that most agencies still set their standards at 1.4. For rebreather, as you said, around 1.3. I just mention the 1.4 so novices don't think they should dive Nitrox to 1.6. And BTW, metric is much easier :)

[@ahmedmahomed]

Soo good explanation ❤❤❤❤❤

[@sbfb9]

Jonathan, thank you for all your videos. I am OWD certified and working on my AOWD and Nitrox curses. I am binge watching your scuba 101 and all your rebreather videos and understanding SO many things. Amazing explanations on apparently complicated topics. Thank you so very much!!

[@cwwong2583]

Very good thanks

[@MarkSmith-xp4nh]

The magic circle makes it easy to understand and a quick way to figure it out. Great video.