Max FHe in a mix

[LFMarm]

Does this apply also to CC diving? Here is how the breathed gas evolves with depth, assuming a 100m dive with 9/74:

pO2	Depth [m]	Breathed gas
0.6	1	Trimix 55/37
0.6	2	Trimix 50/41
0.6	3	Trimix 46/44
0.6	4	Trimix 43/46
0.6	5	Trimix 40/49
0.6	6	Trimix 38/51
0.6	9	Trimix 32/56
0.6	10	Trimix 30/57
1.2	12	Trimix 55/37
1.2	20	Trimix 40/49
1.2	30	Trimix 30/57
1.2	40	Trimix 24/62
1.2	50	Trimix 20/65
1.2	60	Trimix 17/67
1.2	70	Trimix 15/69
1.2	80	Trimix 13/70
1.2	90	Trimix 12/72
1.2	100	Trimix 11/72

The change with depth is quite smooth. I assume the considerations are required for the bailout, right?

 

[kimh]

I posted a video link in another thread here that has some very interesting perspectives on mixing gases with the goal of managing HPNS. Including hydrogen. Let’s just say it’s a good thing that Richard Harris is also an anesthesiologist.

1st deep (750 ft) hydrogen CCR dive: Gateway to deep exploration?

Simon Mitchell takes us back to New Zealand's Pearse Resurgence with Richard “Harry” Harris & the Wet Mules. Really interesting physiological & logistics/gear details. ~250 meters, 16 hours, 6°C… "In February 2020 the Wet Mules diving team pushed the Pearse Resurgence cave to 245m. Further...

scubaboard.com

 

[Wibble]

The change with depth is quite smooth. I assume the considerations are required for the bailout, right?

Main issue with bailout is you normally don’t adjust the gas per dive. You don’t use bailouts on a dive, aside from testing it. Thus you tend to have bailouts for depth ranges, the deep bailout will often be a deeper mix for the depth.