An age-old question: ways to 60m.

[Kay Dee]

I said, "challenge rules" not "break rules".

Yes, but.........
"Rules are mostly made to be broken and are too often for the lazy to hide behind." (Gen. Douglas MacArthur) "Learn the rules so you know how to break them properly." (The Dalai Lama)

 

[old frogman]

Yes, but.........
"Rules are mostly made to be broken and are too often for the lazy to hide behind." (Gen. Douglas MacArthur) "Learn the rules so you know how to break them properly." (The Dalai Lama)

Challenging rules sounds more politically correct. But what the heck, if you want to break things, like they say PE=PLENTY.

 

[Kay Dee]

Challenging rules sounds more politically correct. But what the heck, if you want to break things, like they say PE=PLENTY.

But I didnt think we did politically correct in Oztralia?

 

[old frogman]

Just to change tac slightly. Reference the Uluburum wreck excavation if done today. There are three diving systems currently available that may be rapidly deployed:
OC Air
OC Trimix
CCR Trimix

Question 1 - Based on zero fatalities for OC Air, in the past, I may assume that the same probability may be true for OC Trimix today. However, would the same zero fatalities apply to CCR Trimix for 22,000 dives, considering the complexity of the CCR system?

Question 2 - Considering current diving protocols and politics, which of the three diving systems would likely be chosen?

Question 3 - Could another diving system be used, for example, surface supplied from wet bell (real one that is). Or perhaps using a submersible decompression chamber (dry bell) which can mate to a surface chamber?

There are many deep ancient wrecks dotted around the Mediterranean Sea, still to be found. Some in very deep water.

 

[old frogman]

But I didnt think we did politically correct in Oztralia?

Depends on the audience.

 

[iliketopetsharks]

Just to change tac slightly. Reference the Uluburum wreck excavation if done today. There are three diving systems currently available that may be rapidly deployed:
OC Air
OC Trimix
CCR Trimix

Question 1 - Based on zero fatalities for OC Air, in the past, I may assume that the same probability may be true for OC Trimix today. However, would the same zero fatalities apply to CCR Trimix for 22,000 dives, considering the complexity of the CCR system?

Question 2 - Considering current diving protocols and politics, which of the three diving systems would likely be chosen?

Question 3 - Could another diving system be used, for example, surface supplied from wet bell (real one that is). Or perhaps using a submersible decompression chamber (dry bell) which can mate to a surface chamber?

There are many deep ancient wrecks dotted around the Mediterranean Sea, still to be found. Some in very deep water.

No need to speculate
Home - SDSS

 

[Kay Dee]

Just to change tac slightly. Reference the Uluburum wreck excavation if done today. There are three diving systems currently available that may be rapidly deployed:
OC Air
OC Trimix
CCR Trimix

Question 1 - Based on zero fatalities for OC Air, in the past, I may assume that the same probability may be true for OC Trimix today. However, would the same zero fatalities apply to CCR Trimix for 22,000 dives, considering the complexity of the CCR system?

In my opinion, there would be more likelihood of fatalities in 22K CCR dives.

Question 2 - Considering current diving protocols and politics, which of the three diving systems would likely be chosen?

Having been involved in similar projects, although not so lengthy / many dives, hands down CCR, today (EDIT: during my involvements, it was a mixed batch of OC air, OC trimix and CCR).

Question 3 - Could another diving system be used, for example, surface supplied from wet bell (real one that is). Or perhaps using a submersible decompression chamber (dry bell) which can mate to a surface chamber?

Need very deep pockets for either. I'd sure have liked a wet bell, but personally, not SS.

There are many deep ancient wrecks dotted around the Mediterranean Sea, still to be found. Some in very deep water.

Yes there are. And not just the Med. But at a certain depth. and not much over 100m either, ROV is the only way to fly for an expedition of any length / depth, again IMO (and others too).

 

[Celt]

I’d imagine any well funded university would put an underwater project together today, especially populated parts of the world, using ROV,s. The reason people are getting in the water is to get the benefactors involved. A bit of site seeing and publicity. The people with the largest purse call the shots.

 

[CG43]

Often the only noticeable difference between educated perception and foolhardy rule-breaking is whether one dies or not. Since not all such acts cause death, it is not a very useful distinction. Those who survive are quite noisy about it, those who don't are pretty quiet. So we hear a lot of noise.

No , we don't hear a lot of noise !
And yes, there are also a few idiots who brag about depth.
But these are exceptions because there are at least two good reasons not to do that.

You don't want other divers who don't have the necessary skills to imitate it and get into trouble.
There are reasons to assume that this applies to many divers .

You don't want provoce any scuba police.
And so deep air goes underground.

But it exists in larger numbers than some here imagine, and without many deaths or accidents.
If something happens, such an accident cannot be easily covered up, and the underground becomes public.

 

[Wibble]

Just to change tac slightly. Reference the Uluburum wreck excavation if done today. There are three diving systems currently available that may be rapidly deployed:
OC Air
OC Trimix
CCR Trimix

Question 1 - Based on zero fatalities for OC Air, in the past, I may assume that the same probability may be true for OC Trimix today. However, would the same zero fatalities apply to CCR Trimix for 22,000 dives, considering the complexity of the CCR system?

Question 2 - Considering current diving protocols and politics, which of the three diving systems would likely be chosen?

Question 3 - Could another diving system be used, for example, surface supplied from wet bell (real one that is). Or perhaps using a submersible decompression chamber (dry bell) which can mate to a surface chamber?

There are many deep ancient wrecks dotted around the Mediterranean Sea, still to be found. Some in very deep water.

Not enough info to answer this question in a general sense.

What are the location issues? Availability of help if something goes wrong (helicopter, chamber location). Weather and diving conditions. Type of boat. Conditions on the wreck. Expected slack period and currents. Target bottom and decompression times. Number of divers diving.

This week is a 70m/230ft wreck week in Malin Head, NW Ireland. The nine divers are all diving CCR on at least 14/50 trimix doing 1h30 to 2h30 runtimes. Helium for open circuit is NOT available. Nobody would be stupid enough to dive OC air, nor would they be allowed on the trip.

Your questions are too binary. Nobody would choose the inappropriate technology when far better technologies are available. This is borne out on the dive boats: there are very very few open circuit trimix divers seen on any dive boats for decompression diving. CCR is the most appropriate technology for diving beyond NDLs and especially below 45m/150ft.

Of course if you had to do a quick bounce dive in good conditions and only had air, then it is of course possible, but nobody would use that if better technologies are available.