Which do you think is less dangerous at 160ft? Open-circuit air or CCR trimix?

[J-Vo]

Yeah, similar # of fatalities, but the number of divers (and therefore, # of dives) has vastly increased. Using their numbers, I'd ballpark a 30% reduction in the fatality rate on CCR.

There is also no attempt to compensate for how dives skew to the extreme between single tank NDL toward rebreather. Not too many people buy an RB to swim around on shallow warm reefs for an hour.


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Additionally, way fewer 100 meter + OC dives and 5k+ OC cave penetrations happening these days.

 

[PEDiver]

Not too many people buy an RB to swim around on shallow warm reefs for an hour.

Don't tell the DT GO folks that.

 

[Doc Harry]

Do people really get only a "little" narcosis at 160 feet on air or EAN?

 

[Celt]

Yeah, similar # of fatalities, but the number of divers (and therefore, # of dives) has vastly increased. Using their numbers, I'd ballpark a 30% reduction in the fatality rate on CCR.

That would add up to a risk of dying on a rebreather 3.5 to 7 times more likely than OC

 

[broncobowsher]

That would add up to a risk of dying on a rebreather 3.5 to 7 times more likely than OC

That's like saying you are more likely to die in a race car than in your street driven Camry. Yes a race car on a race track is a higher risk. Put your grocery getter on a race track and whack it into a wall at full speed and compare that to a prepped race car. The race car will have much better odds.

You are comparing diving open circuit, taking a regular car to the grocery store, to a rebreather going to the races.

You have to have the correct reference point.

 

[Celt]

That's like saying you are more likely to die in a race car than in your street driven Camry. Yes a race car on a race track is a higher risk. Put your grocery getter on a race track and whack it into a wall at full speed and compare that to a prepped race car. The race car will have much better odds.

You are comparing diving open circuit, taking a regular car to the grocery store, to a rebreather going to the races.

You have to have the correct reference point.
View attachment 882403

I think people are bringing the race car to the grocery shop.

 

[iliketopetsharks]

I think people are bringing the race car to the grocery shop.

Then doing this dive on OC air would be like bringing a beach cruiser bicycle to the 24 hour le mans race...

I don't think anyone would seriously say this would be dangerous and stupid on OC. The problem is air instead of trimix.
And, come on, air to ~50 meters? Why?

 

[Celt]

Then doing this dive on OC air would be like bringing a beach cruiser bicycle to the 24 hour le mans race...

I don't think anyone would seriously say this would be dangerous and stupid on OC. The problem is air instead of trimix.
And, come on, air to ~50 meters? Why?

It’s free, an endless supply and a legitimate gas to 60m with proper training and experience

 

[iliketopetsharks]

a legitimate gas to 60m with proper training and experience

How does "proper training and experience' negate physics?

 

[Celt]

How does "proper training and experience' negate physics?

Its done all the time,

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The Deep dive Air course gives skills to practice dives breathing air within a maximum depth of 50 m or 60 m, with decompression stops with Nitrox 50.

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