An age-old question: ways to 60m.

[iliketopetsharks]

20-30 Minutes of bottom time, in clear and relatively warm water and lots of people around you, great.
I dont say you'll have to die on air at those depths. But it is a fair-weather solution.

 

[wetb4igetinthewater]

I will share some stats; Uluburun shipwreck was excavated between 1982 and 1994. Depth 44m - 61m. Dives were done on air with surface supplied o2 for accelerated decompression, typical bt being 20-30 mins at target depth.
22+k dives and 0 fatalities.

Has everyone read the entire article? George Bass is probably the biggest name in underwater archaeology and they had quite a setup if you continue doing some searches. Not exactly representative of what we are talking about here.

Who of you dive a wet bell to such depths for safety?

Oh, no one? Thought so.



I'm guessing none of you have actually worked on an underwater archaeological expedition. They are extremely safety conscious. One death would mean the end of a career, including the late great George Bass.

 

[Kay Dee]

20-30 Minutes of bottom time, in clear and relatively warm water and lots of people around you, great.
I dont say you'll have to die on air at those depths. But it is a fair-weather solution.

Agreed on the 20 / 30 min BT in warm and clear water, but not for the need for lots of people around. After all, we are not talking about 'recreational' diving here (although most may dive for recreation). And why do I say that (no need, etc); from the get go of my tech training, and for more than half of my 30 odd years diving I (and quite a few people I knew) mostly dived solo, deep or shallow, OC or CCR. Might have entered the water at / around the same time as others, but that was the extent of it. Oh the horror, the horror............ deep air (at times) and solo.

And my condolences that it seems you dont have 'fair weather solutions' in your neck of the woods.

 

[old frogman]

Has everyone read the entire article? George Bass is probably the biggest name in underwater archaeology and they had quite a setup if you continue doing some searches. Not exactly representative of what we are talking about here.

Who of you dive a wet bell to such depths for safety?

Oh, no one? Thought so.

Not representative of what we are talking about here? What rubbish. At the time they were deep air diving with regular scuba gear. I saw the photographs.

You guys need to stop continually situating the argument to justify your ideology.

If you are truly science based, you need to argue the situation.

 

[wetb4igetinthewater]

Not representative of what we are talking about here? What rubbish. At the time they were deep air diving with regular scuba gear. I saw the photographs.

You guys need to stop continually situating the argument to justify your ideology.

If you are truly science based, you need to argue the situation.

what part of using a wet bell did you not get?

 

[Kay Dee]

Has everyone read the entire article? George Bass is probably the biggest name in underwater archaeology and they had quite a setup if you continue doing some searches. Not exactly representative of what we are talking about here.


scubaozy: I will share some stats; Uluburun shipwreck was excavated between 1982 and 1994. Depth 44m - 61m. Dives were done on air with surface supplied o2 for accelerated decompression, typical bt being 20-30 mins at target depth.
22+k dives and 0 fatalities.

Now that you bring it up Kosta, more or less exactly what I am talking about* as it were, i.e. the 'conditions' that I mostly dived in for ten years or more of my recreational tech diving 'career' (EDIT: and what hundreds of other people in 'my' circle availed themselves of on the liveaboard we dived from), although mostly not on air for me (only air for some others involved in the 'group' though), and often with longer bottom times. (*i.e. "Depth 44m - 61m. Dives were done on air with surface supplied o2 for accelerated decompression, typical bt being 20-30 mins at target depth."). And in the spirit of "openness", although I was not present, a couple of deaths (2) during that time, both on OC air, one at / near surface, the other shallower than 40m / 130ft (@ about 30m / 100ft IIRC).

 

[iliketopetsharks]

Not representative of what we are talking about here? What rubbish. At the time they were deep air diving with regular scuba gear. I saw the photographs.

You guys need to stop continually situating the argument to justify your ideology.

If you are truly science based, you need to argue the situation.

Bells and submersibles, very regular gear?

 

[wetb4igetinthewater]

Bells and submersibles, very regular gear?

Wait, you don't have one of these in your save a dive kit?

Amateur!

 

[iliketopetsharks]

Wait, you don't have one of these in your save a dive kit?
View attachment 909141
Amateur!

Noo, i have a condition called "being poor"

 

[scubaozy]

That is called phone booth, it is used to communicate with each other and the surface, not a diving bell. As you read, it is also used when (in case) regulators would fail, because majority did not even have a second independent air source or a regulator. People who did the dives were not trained in tech diving, they were amateur divers.
Todays average tec dive(r) would be way safer than what they did back then.