min deco rules?

[floater]

The only write-up I've seen of the min deco rules is posted on the 5thd-x's dir forum, but there are minor differences between what i was taught and what's written up there.

for example, they suggest that you double the 9/6/3 meter stop times for repetitive dives with short surface intervals whereas i was taught that SI's don't matter, and even time to fly is unnecessary as long as you followed the "table" and did a proper ascent.

also, i was taught to apply the "table" with respect to average depth.

just wondering if this is what others were taught, especially recent dir-f students, or better yet where i could find a write-up of the latest min deco rules and recomended dive profiles.

[Red Sea Explorer]

Here is what I do.

I like the idea of standardization. So I follow my standard deco curve. Start stops from 75% of the depth (pauses). I do one minute stops all the way from the 50% mark to the surface. I do the same for repetitive diving over and over. But if I am doing a lot of diving in one day I take a 40 of O2 just to clean up in the shallows for a few minutes.

This is the most frustrating thing about learning DIR, you never know where to find the material and you have to go kissing peoples as**s to get some info. But it is usually what this guy is doing and what that guy is doing but we never now if it is what is being taught or what is being used. Who should be we going for this info anyway. This agency or that person or …… it just gets annoying.

You have to hand it to PADI, they have all their material very well laid out. One day in the future we will hopefully have a DIR oriented agency that is organized enough to offer that.

Finally, there are the DVDs that are being sold by 5thd-x promise to be more or less comprehensive……but are they really DIR…..are they Not………the plot thickens….will we ever know………who wakes up in the morning and decides what is DIR and what is not…..…

Ok so I am going of topic here……going back to the deco question…..the answer is no body knows……..it will forever remain a mystery.

[EBT]

Quote: (Originally Posted by floater)

for example, they suggest that you double the 9/6/3 meter stop times for repetitive dives with short surface intervals whereas i was taught that SI's don't matter

Now Im not DIR as you all know.... but I've done a little diving here and there. I would strongly recommend you do not discount residual gas for repetitive dives, especially if theres a short surface interval.

As someone else said, DIR has some great points, information management (consistency and flow) is sadly not one of them... yet!

[Richard Lundgren]

GUE minimum decompression (MD), similar to NDL (no decompression limit), will be presented in details both in our soon to be released Open water manual and workbook as well as in the new refined Fundamentals workbook. GUE will also present a printed MD table with clear recommendations regarding recreational deep stop and repeated diving guidelines. Simple and clear – no mystery here, you must be referring/hinting towards another organizationJ

Take care,
Richard Lundgren

[Martin Burnard]

Floater.
I agree. Last night I was reading the same article and came online to ask the Q but you were ahead of me.

The sooner GUE gets its printed material sorted the better.

Odd when you consider its approach is to be prepared in the water and plan, but when you want the written text to refer to its not there!

But hey nobody is perfect.

[Red Sea Explorer]

Hi Richard,

I hope this materializes as it will improve the image of the DIR diving community and make it safer for all.

What about decompression? Is there a unified/standardized approach to it?

When planning a dive to 30,60, 90 or 110, what do you use?

What I was taught in my courses has been refuted and I am unclear about what system is recommended according to the new protocols.

[Mozi]

Floater.

Other than trying to get exactitude, which is a long process in deco for the infinite possibility of profiles and which in my opinion puts you in the wrong framework (if this is the only method you are using to do proper deco) you need to read a lot , apply slowly and learn.

Conceptually, the "min deco" and other deco articles on wkpp.org are primal and need to be read over and over, not as gospel, but as the big picture. In addition, go to the Quest archives. Search for "min deco" and absorb. Use all else as additional tools and / or as a starting point. Ultimately, with enough diving and careful experimentation, you will know how to deco.

Understanding is better than rules, on the long run.

Mozi

[DRE]

Quote: (Originally Posted by Mozi)

Floater.


Understanding is better than rules, on the long run.

Mozi

What a novel concept indeed:D

[floater]

Quote: (Originally Posted by EBT)

Now Im not DIR as you all know.... but I've done a little diving here and there. I would strongly recommend you do not discount residual gas for repetitive dives, especially if theres a short surface interval.

As someone else said, DIR has some great points, information management (consistency and flow) is sadly not one of them... yet!

GI3 once wrote that Navy tables are nonsense, and that they bend you by not doing the deep stops and then treat you by extending the shallow stops.

I think the GUE algorithm attempts to eliminate the bubbles with a slow ascent and plenty of deep stops rather than with one shallow stop and a long surface interval. Also, since we are supposed to do this without a computer, it's just easier to assume that you start fresh each time, rather than try to track your off gassing on land. Of course people differ and some may need more deco time than others, so caution is always recommended. I think GI3 has suggested people try some light exercise after diving just to check how it makes them feel; to see whether they off gassed properly - he also noted that if you bend yourself doing that then you should blame JJ. Well, that's my understanding, but as a newb to all this I invite others to correct me if I got anything wrong.

[Mozi]

Quote: (Originally Posted by DRE)

What a novel concept indeed:D

Should have added "deco" after "Understanding"; that would have sounded less "novel", but I thought that was implied

Mozi