Deep Air Poll

[iliketopetsharks]

Planning the gas mixture and quantity carried for the dive.

Is that not an essential part of scuba training?

 

[lostsheep]

Above which blood alcohol content we enter "DUI" territory?

• 0.05%
• 0.08%
• 0.10%
• Etc.

I understand that in some contexts it's necessary to set a fixed limit for the sake of enforcing standards. But in regular diving the point isn't to press right up to the limit and stop: better to use the correct gas instead of pressing your luck and getting into normalization of deviance.

Gonna preface this with I’m not on team deep air.

I really wish the comparison to alcohol would stop; it’s not remotely the same kind of risk due to WHO is at risk. The libertarian in me believes one should have the right to endanger themselves. To head off the rescuer’s risk argument ; no one is forcing a rescuer to engage in risky behavior , they chose that line of work themselves as is their right. If you’re not willing to do dangerous **** then rescue work is not for you. If I had a problem with sharp metal objects I’d stay the hell out of my machine shop.

Related ,the martini rule is absurd, everyone knows this would be a better comparison:

 

[NothingClever]

What I get out of the alcohol comparison is the lack of objective assessment about one's condition.

I'm not seeing an equivalency drawn regarding the outcome, e.g, the drunk driver crashing his / her car head on with completely innocent people killing them but surviving - that's not equivalent to somebody doing a dorky bounce dive to 60m on air just to do it and coming up snake eyes when something goes wrong because there was no margin for error.

It's more about the lack of judgment about getting in the car in the first place and not having a better plan.

 

[chrisch]

Is that not an essential part of scuba training?

No. Most basic courses use air and have no option for mixtures. Most basic scuba will simply use a 12L tank or similar as a default.

Gas consumption during the dive is not calculated and the training is simply to begin the ascent at a given pressure.

Some agencies now introduce EAN at introductory level but it is a long time since I was involved in that end of scuba. Nitrox was fairly new when I started, it was a seperate and optional course with PADI. Lots of divers never go on to do nitrox training.

 

[rjack321]

Why don't you start a poll for one. This poll it about air.

Please tell me what the correct gas is for a 32m max depth on a dive.

Tell us more about the dive? Is there a raging current? Are you in a cave swimming against that current? Is the water temp 2C, 7C, 20C, 25C? Is it a silty overhead? Is the visibility 2m, 10m, 50m? Are you surveying or collecting data/information that requires math or legible notes? How long does the dive need to be? How long do you want to stay down? Are you far far from a chamber? What size cylinders and what gases are even available?

Maybe (duh!) depth and gas are just two of many dive variables and there is no one-to-one relationship between depth and gas.

 

[lowwall]

I think 90% of people who have good tech diving experience can quickly figure out meters to feet by simply multiplying by 3.

3.33... , i.e. 3 meters = 10 feet is much closer and still easy to calculate.

Example for 30m:
3.0 approximation = 90 ft
3.33 approximation = 100 ft
exact depth in feet* = 98.4251968504 ft.

*There is an exact answer because the US decided to define the inch as 2.54cm in 1959. So 1 foot (12 inches) = .3048m and 1m = 3.280839895 feet (approximately? I need a better calculator program).

 

[Blackcrusader]

Is that not an essential part of scuba training?

Not for OW AOW RESCUE DM etc in PADI as PADI only teaches NDL dives. There is for Deco training in other agencies