ethics of taking divers beyond their training depth...

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i've known of INSTRUCTORS teaching Advanced Trimix courses (100m) on Air while their students are on tmx...this is just STUPID and IRRESPONSIBLE. if something happened to the student and they needed air from the instructor, immediate narc hit at that depth!

Thats borderline criminal/jest......I would doubt this happens to often....I have never heard of such a thing.
 
I wouldn´t dive with anyone significantly below the depth they are qualified to dive. Being qualified isn´t just about cards or courses but experience of similar dives as well.

I also follow the "not more than 40ft deeper than recent experience"-rule from 120ft and below, depending on the divers experience and the particular dive I wouldn´t feel comfortable with a buddy who "violated" that rule either...
 
Thats borderline criminal/jest......I would doubt this happens to often....I have never heard of such a thing.

I've heard of it. The instructors that do this just need to realize that if that happens, they will need to bring the student to a non-narcotic depth, and this may not be an easy task.
 
I'm fortunate in that when doing dives beyond rec depthd I'm diving with someone who is at the same level of training or greater than I am. SO far I've extended my depth to 155ft on 21/26. But my buddy was diving the same mix. That's as far as i need to go right now. I'm doing adv nitrox and deco procederes later this summer. Even though the profiles I've done so far did include deco on backgas which was part of the training. Sure would be nice to do it on O2. However if you run the numbers If one were to say deco on 40-50% then for certain dives the scedule is pretty close to someone doing it on O2 with the difference being the guy on 40-50 would be starting the deco earlier. But even then I don't think I'd like to be on a different scedule than my buddy even for a couple minutes at any stop. Murphy is always waiting for an opening. I only mention these scenarios as there may be times when 100% O2 is not available or may not be absolutley necessary.
 
There is a difference between training standards and standards of conduct. For many individuals the training standards become their standards of conduct. For some they are different.

When your training to a certain level, your are not per se bound to those levels afterwards. It is up to the individual to decide (and determine risks) how and where to draw lines. This can be going beyond or staying below the training levels.
 
Good point Meng_Tze - I agree. Training imparts a set of skills that does not gaurantee you safety at any depth, nor limit you to a certain depth if you use the training appropriately.

To the OP, there is no "risk of narcosis", there IS narcosis that increases with depth and there is a risk associated with being narced. I limit my dive partners to those who pose the least risk to ME by their potential for problems. If they're in trouble then I'm in trouble by default. Therefore from my own selfish point of view, I'd think long and hard before diving with someone who I KNOW will be impaired to an unknown extent. I'm not saying they can't do the dive - just that it's beyond my personal risk limit to do it with them. I'm safer doing the dive alone.
 
I've heard of it. The instructors that do this just need to realize that if that happens, they will need to bring the student to a non-narcotic depth, and this may not be an easy task.

Especially from 100m (~330ft)!!!! If the tmx diver needs gas on the bottom, and takes a breath of AIR, their not going to have the chance to deal with the narcosis, the sudden hit of that high PPN2 will knock them out...

This gas switch wouldn't be AS big of a problem in the 50m (~160ft) range...but it could pose some issues! I'm willing to donate myself as a subject to any experimentation regarding this...accepting offers...:eyebrow:
 
As several of you may know, I have routinely dived to depths not exceeding 200 ft on air. Often I have divers on board the dive boat ask if they can dive with me. I rarely will take anyone else to depths beyond recreational limits (or even 100 ft) unless I am pretty familiar with their diving history and skills, and know that they are equipped to dive safely should something happen. I won't even take my experienced dive buddies beyond 160 ft. When I am at the deeper depths, I don't want to have to think about the safety of another person as I focus on the limited time I have at depth to locate subjects and film.

It never ceases to amaze me when I see divers who are fairly new (say less than 100 dives), want to dive solo without redundancy and occasionally to depths far exceeding their training. I would not want to dive with any of these divers, even to depths within rec limits.
 
I've heard of it. The instructors that do this just need to realize that if that happens, they will need to bring the student to a non-narcotic depth, and this may not be an easy task.

I don't doubt some moron instructor out there has pulled this stunt.....but you gotta wonder WHY they would....Stranger Than Science!!
 
I don't doubt some moron instructor out there has pulled this stunt.....but you gotta wonder WHY they would....Stranger Than Science!!


So they don't have to pay for the HE....
 

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