Low on air in deco

[Jan76]

So Spearfisherman55, I'm just curious, what are you going to do??

You asked for advice (in various threads) and got loads of it from some very respectable and experienced people, some of which come from certified instructors linked to various agencies. Most of the explanations you got were, at least to my opinion, detailed and show exactly why certain things you want to undertake are dangerous or even life threatening to you (and your buddy).

I'm doing my deep-dive specialty and I've been reading this thread with my mounth open in amazement.....doesn't this all ring a bell with you?? Don't you get the realisation that you (and your buddy) might have been doing things the wrong way, putting you and your buddy in very real danger? Looking at the questions and reactions you placed in this thread I would say not.

Have you ever made a realistic gas planning that makes you realise why the rule of thirds might work for cave divers with their double sets etc and probably not for you?? Have you ever made one at all? Does your buddy make one for you? Is your uncle capable of getting you safe top-side when things go wrong? Are you capable of doing the same when something happens to him?

You say you're going to stay above 60'. Did you talk to your buddy/uncle about that? What did he say? Be honest, are you really going to do it? Did you consult your own insructor already with the questions you're putting on this forum? Do your parents realise that you are willingly or unwillingly taking risks that lay (far) beyond your training and probably also your equipment that can cost you your life when murphy comes into play?

 

[miketsp]

If I go into deco, and I am low on air what is the best way to complete the deco faster? My max depth is 140' right now, I am diving with just compressed air right now.

This is a perfect case of "If you don't know the answer already you shouldn't be doing it."
Most tables in use are already optimised to maximize off-gassing without bubble formation at the interface which would have a detrimental impact.

 

[TX101]

Just my 2 cents..

I've noticed a couple of times people saying agencies require 100 dives to start technical training.. For TDI in the UK at least, this is false (well, depending on what you classify as "technical"). For Ad. Nitrox & Deco, the only requirements are 25 dives and 18 years of age. For the trimix corse, it's 100 dives & 18 years of age and for the Extended Range (deep air) it's 100 dives, 30 (or 35, cant remember) below 30m (100 feet) & 18 years of age. So in theory a OW diver can do all the PADI courses straight to rescue, then do Ad. Nitrox & Deco and be certified to 45m, deco diving - all in about 30 dives.

Anyway, the other point I wanted to make was that as most people know (but nobody has yet pointed out), every dive is a deco dive and there is no magical line. Just because the computer has counted down to 0, dosen't mean you wont get bent. And conversely, just because the computer says you have 5-10 minutes left of deco, dosen't mean you will be bent when you get out of the water.

So to answer the question, If (for some reason) I was at 6m doing deco and ran out of air (or deco gas) and had no buddy, what would I do? Well, surface of course...

 

[mania]

Hmm
I'm still almost sure that this is a troll.
I can't believe anybode grown up would be so irresponsible to take his 17 year old nephew diving that deep!

But just in case you don't remember all the answers given here I owuld reminf you:
PLAN YOUR DIVE AND DIVE YOUR PLAN

And quit going any deeper that 18 meters.
Mania

 

[Sideband]

What you can do now, that the others cannot do, or that the others should not do, is go out after lunch on another boat and dive 2 more dives, with nitrox again, and then a night dive as well. That is what nitrox does for you. LESS N2 LOADING compared with air.

I agree with that. What I didn't agree with was your statement that only the tooth fairy and Santa would teach diving air to 100' and hinting that nitrox is safer (than air)at greater depths as if that was its purpose.
I should have mentioned the repetitive dive part when I said extended bottom times.

Joe

 

[lorien]

First off, what everyone else has said. I hope by now you understand the dangers you are putting yourself in doing the type of diving that you have been doing. Your uncle should certainly know better and I have not a clue why he is doing what he is doing.
That all being said, we do have to take into consideration your age and the fact that you are, in fact, diving with your uncle. You may well feel that you now know that you are letting yourself be taken into some dangerous situations by a well meaning (?) uncle who does not know any better even tho he certainly should if he has the training that you are indicating. Shame on him but that still leaves you with a family authority figure taking you on dangerous dives. I HOPE you now understand that you should not be doing the dives that you have been doing and are looking to be able to dive more safely. If not then we are all wasting our time here. How difficult is it going to be for you to go to your uncle and tell him that you are uncomfortable doing these dives, that you know you are not qualified for them and you would prefer to stay within the recreational limits that you are certified for? You need to be able to sit down and discuss this with him. If you are not comfortable doing that then go and talk to your parents. Explain that you really appreciate being able to dive with your uncle but that you are not comfortable with the dive profiles and want to dive more conservatively and do not know how to address it with him. Let them help or whichever parent you feel more comfortable talking it out with and that you think will react in a way that will allow you to continue diving in a safe manner. I know your parents have not a clue as to what is really going on here or they would have stepped in already. One way or another you have to address this before your next dive as your next may well be your last and it just is not worth it.
You have not said much since the thread started and perhaps you are feeling a little intimidated by the comments but you have to understand that no one here wants to see you (or your uncle) get hurt or die. We want you to continue diving but to do so safely so that you have many more years of diving ahead of you. No one here wants to be on a recovery team either and we are all worried that is where your diving is heading you and your uncle.
Also, you should not be waiting until you have 500 psi to start your ascent especially from those depths, at least try to end your dive with 500 psi in your tank. That means starting your ascent with enough air to ascend, do your safety stop and then slowly surface and still have at least 500psi left. Not all that hard to do but you will have to start your ascents much sooner. If you are not diving as deep then you will also be able to have longer dive times as well.

 

[pt40fathoms]

Just my 2 cents..

I've noticed a couple of times people saying agencies require 100 dives to start technical training..

-snipped-

So in theory a OW diver can do all the PADI courses straight to rescue, then do Ad. Nitrox & Deco and be certified to 45m, deco diving - all in about 30 dives.

Sorry to inform you of this, but your theory is incorrect. You can do all the recreational specialties and up to Rescue Diver with PADI, with no prerequisites on the number of dives. However you must have a minimum of 100 logged dives to start any of the Tec courses offered by PADI.

I can’t speak to the requirements of other training agencies, but I’m sure that a certified instructor from those agencies could clear up any questions in that regard.

 

[triton94949]

100 dives is a good benchmark to beginning trimix, or any kind of decompression training.

 

[spearfisherman55]

.

 

[spearfisherman55]

.