Quiz - Recreational Dive Planner - Exceeds NDL By 6 Minutes

[Steve_C]

Relaxed indeed! To the point of being cavalier if you ask me.

. She was very much a free spirit. Playing soaring bird in the water. Very cavalier. She had a stressful job in the military which required a lot of skill. But needed to learn that just because you are having fun and off duty does not mean you do not need to understand some things. By chance we dove with her again later. She had learned the lesson.

 

[dmaziuk]

Which forum was it where Dr. Simon Mitchell (?) posted updated guidelines on IWR recently?

 

[lowflyer]

Why does that matter? The explicit recommendation is to stay at 15 ft for at least 15 mins, longer if you have gas to do it. It is of course a long deco stop for those who are not trained in deco. When you finally get to the surface, you monitor for DCS, and if it shows you move into O2, etc. And stay out of the water for 24h, because (1) most DCS occurs with in the first 6h and almost all occurs within 24h, and (2) in 24h you have off-gassed enough to get back in the water.
And, all that time at 15 ft, and 24h out of the water, is being put in the penalty box for having been so careless in the first place.
What more would you like to see?

I understand all of that, thank you.
It matters because potentially there is a point at which someone may have gone so deeply into deco that 15 minutes at 15 ft is clearly not going to be enough, and the boat should head back to shore with the person on O2, symptoms or not.

 

[tursiops]

I understand all of that, thank you.
It matters because potentially there is a point at which someone may have gone so deeply into deco that 15 minutes at 15 ft is clearly not going to be enough, and the boat should head back to shore with the person on O2, symptoms or not.

Sure, but what you are describing is what happens after surfacing. It doesn't change the RDP's in-water recommendations.

 

[lowflyer]

Sure, but what you are describing is what happens after surfacing. It doesn't change the RDP's in-water recommendations.

I know, but it changes the other part of your statement:

"In both cases after you surface you have a wait time before reentering the water: 6h and 24h respectively. Those times are chosen to monitor for DCS and to wash out the excess nitrogen"

Maybe you don't have that "wait time" in the scenario I'm trying to get at. So in some circumstances the rule of 3 and 5, as you present it, doesn't cover what to do with the diver in deeper deco who is well beyong the "five minutes."

I don't know, maybe I'm not expressing myself well enough. I'll quit.

 

[chillyinCanada]

Which forum was it where Dr. Simon Mitchell (?) posted updated guidelines on IWR recently?

If he did post updated guidelines, it wouldn't have been in Basic

 

[NAM001]

How do you exceed NDL by six minutes and not discover it until after you surface?

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