Petrel Tissues Demo

Demo of a decompression dive showing the new tissues bar graphs on the Shearwater Research Petrel technical dive computer.
The Petrel is a trimix dive computer, capable of open-circuit (OC) and closed-circuit (CC) decompression diving. Of course, the Petrel is also capable of air and nitrox dives as well.
The tissue bar graphs show the combined inert gas loading of nitrogen and helium. They have been scaled for quick visualization of the tissue loading in terms of decompression risk.
This demo shows an open-circuit nitrox decompression dive.

[@hitchjay]

I was having difficulty understanding GF for decompression theory and this visualization was perfect... Thank you so much

[@ShearwaterResearch]

Hi Cathal, you can see the tissues bars at any time by pressing the right button a few times to scroll through the various info displays.
The purpose of the display is to inform and educate. For instance, on the surface you can see how much residual inert gas remains after a surface interval. At the end of your bottom time, it might be interesting to see which compartments have saturated. The info isn't incredibly useful, but it does give some insight into how the deco models work.

[@alexhoksbergen6161]

This is a very clear and well explained demo, thank you, I learned a few things about my Petrel today!

[@stevelewis5890]

excellent video. Certainly highlights one of many useful teaching features on the Petrel for those of us who instruct. And of course, yet another reason to invest in a Shearwater.

[@cfr94363]

Great video, you made it really easy to understand what's going on. Thanks!

[@bcdiverdennis]

Great video ! Well presented and clearly explains what's happening.

[@cam2724]

THIS IS EXCELLENT!!!...very good tool for explaining how Tissue tensions work.

[@ygr2110]

Thank you, very helpful and well done 👍🏻

[@maxlongo306]

Hi. Great video, thanks. Just purchased a PERDIX Computer. The manual directed to this and other videos. Getting used to. Going to dive this weekend. Can´t wait to go in with this great Computer. Regards

[@richardtomlinson4425]

Thank you - just bought a Perdix AI and this is very helpful.

[@brazeagle]

Very nicely explained. VALUABLE info. Thanks a lot.

[@zgoume]

Very nice video! I've just bought the Perdix, and i was kind of confused with this graph! Now it's clear!!

[@pai5000]

Excellent online visualisation of the GF. Looking forward to get this on Predator as well. Thank you.

[@barryshively6938]

Look forward to seeing the bar graph in a future update

[@jamesrankin1041]

Excellent video!

[@guilhermeaguiar9498]

Congratulations!!!!
Very nice explanation!!!!

[@albertokusmic9239]

Very well explained, thanks!

[@diveaddict6885]

Great explanation

[@brian6140]

very interesting and enlightening. I have to confess I rarely watch that graph.

[@martincalleja]

Hi, great tutorial. you nailed it. They say that curiosity killed the cat but in this case, it made him more aware! thanks.

[@daneapeterson]

Well done Sir. Excellent and informative video. I am now a subscriber.

[@robertbutcher1822]

Thank you very clear

[@josemanuelcarvalho6413]

great video!! really helped! thanks.

[@ShearwaterResearch]

Yes, if we get feedback that it will be a useful feature, then we'll add it to the next Predator update.

[@lucasmacmillanhernandez1965]

thank you !

[@makismakis9955]

nice video.

[@pathfinderLXXIV]

Any chance of a firmware update where you could change your inspired surface gas? So, if you're on the surface and breathing 100% O2 during your surface interval, it'll account for that?

[@peterbucknell]

good stuff

[@keratoconus2821]

good job sir - shame on the thumbs down!

[@RichardWait]

Thanks for the info. Very informative.
Now....do I wait for the Fisher Petrel or go and get a Predator! Hmmm

[@andyaston]

At last I understand GF thanks, I was just wondering if the inert gas would be comming out quicker at 10ft as opposed to 20ft as there is a bigger pressure difference or is off gassing linear? I would of thought the bigger the pressure difference the faster the gas comes out of a solution. Or is the model based on it being linear?

[@keeferdog5617]

“WHAT HE SAID”

[@SEA-O2]

Do we have transmittable ccr o2/co2 sensor readings yet? Do we have CCR loop gas analysis checking mid-flight yet? Do we have CCR, full-purge and no-purge, loop flush with gas-switching on the fly yet?

[@felixmatthewcheryl]

do you have a video showing the Petrel EXT model. I am an SCR diver and has a 3 cell O2 monitoring system and would like to see how this works. Thanks

[@mrtomaszgorecki]

Thanks for video, I found it very helpful.
In the end of film I understood that computer will be useful also to observe off gassing in the surface and I’m interested - can it help me to monitor when can I go trekking on mountains after dive?
Is it taking into consideration decreasing pleasure on the surface when I’m going up?

[@mrtomaszgorecki]

I was thinking about decreasing pressure when I'm going up :-)

[@tomthompson7400]

I read in the updates for predator that tissue graph was added , I upgraded my 2016 predator , and didnt see the option for tissues , or is it only visible in dive mode .

[@SylvesterMuller]

Cool, will that be on a future update for the Predator?

[@tombodera3338]

Thanks. While on the surface you mentioned that the computer assumes you are on air, but the ppo2 displays 0.99p02. Should it not be 0.21 p02?

[@turbo13r]

Hi Bruce
Can you outline how this tissue data is utilised by the diver i.e. are we supposed to have this tissue screen on display throughout the dive, or is it for reviewing the dive
afterwards and if so how do we access it??
Rgds
Cathal ( new petrel owner)

[@qilu6313]

Nice video! This should also apply to Teric right?

[@ShearwaterResearch]

Yes, it does apply to the Teric too.

[@christinababcock305]

How did you get the tissues graph to "stick"? mine keeps defaulting to the main screen.

[@hummaid1]

Switch gas during deco stop will increase eliminate nitrogen from tissues . Is it factor to form bubbles in blod stream?

[@sergiomartinezherrera6076]

Thanks for making clear that know nothing about diving..😂