An age-old question: ways to 60m.

[wetb4igetinthewater]

I have dived a real wet bell. That is not a wet bell. If you look carefully, it is a plastic dome attached to a some weighed down boards. It is static location on the bottom. Probably used for divers to enter in order to verbally communicate while on the bottom. If you look carefully at the divers, they are on OC scuba.

If that was a wet bell there would be wire cables leading to the surface to lower and raise it. There would
also be a communication cable. There would also be a control panel above the divers inside the bell cupola for controlling gas flow into the bell. The divers would probably be on surface supply with a full-face mask or helmet.

Please stop situating the argument and argue the situation. And please stop trying to pretend you are a professional. Clearly you are not.

Okay, I will try one response today as I have a busy day.

Using this shipwreck as an example of as an example of how it is safe to dive air to such depths is invalid due to the additional equipment involved (using a wet bell to transport people up and down does increase safety), the shipwreck max depth was at 61 meters up to 44 meters. That is quite a range where the gas density changes quite a bit.

You should spend some time looking at some of the readily available information on the internet. @iliketopetsharks provided a PDF article from which that screengrab came.

Now, you can thump your chest and tell us how you are a Andrew Tate-like alpha male doing dives that the average person will defecate in their drawers here on Scubaboard, but you won't be the first.

Nor last.

 

[Allen-1]

 

[J-Vo]

So again let me ask........since no takers so far to my previous......and I'll make it even easier..............

........how many more people do you (anyone can join in here ) know that died on deep air than and how many do you know that died on OC trimix or CCR?

Denominator lives still matter

 

[lostsheep]

Also, some of us do have science degrees from real universities. Which means we challenge rules (as opposed to breaking rules).

True scientists oppose ideology. Like Galileo, Leonardo Da Vinci etc. opposing the Roman Catholic Church in the Renaissance.

I’ll just post my stance so no one ASSumes my position. 60m is too damn deep and the 100’ dir limit is too damn conservative. I do take narcosis and gas density into account when choosing my own limit fwiw.

Okay, that out of the way. Your renaisssnce men were not true scientists like we think of today. The last mystics would seem to be a more accurate description. Galileo set the foundation but scientist is a leap.

E pur si muove

 

[tridacna]

 

[crofrog]

Not sure what the other side is? NEDU that is the US Navy, Naval Experimental Diving Unit. They are the ones responsible for producing the US Navy Diving Manual and periodically revising it.

Let's see, US Navy Diving Manual - Revision 7, Chapter 7 SCUBA Air Diving Operations, page 7-2, Maximum working limit for air 190 feet (58 metres).

Also, if you peruse the US Navy Tables you will note they cover air diving to 300 feet depth of sea water.

Also, some of us do have science degrees from real universities. Which means we challenge rules (as opposed to breaking rules).

True scientists oppose ideology. Like Galileo, Leonardo Da Vinci etc. opposing the Roman Catholic Church in the Renaissance.

Science is not black and white. In particular, science related to physiology is very grey. Yes, we can arbitrarily set lines across grey areas and call those lines rules or standards.

I will look at rules but is they do not fit the context of the dive; I will challenge the rules. If necessary, I will modify or discard them for something more suitable.

Of course, perception will play a part. That is educated perception.

What operational needs do you have to go recreational scuba diving?

You want to talk about 190 being the max limit, but the normal operational limits are <130ft no decompression diving.
Do you have a chamber on site for those dives deeper than 100ft?

 

[tursiops]

I will look at rules but is they do not fit the context of the dive; I will challenge the rules. If necessary, I will modify or discard them for something more suitable.

Of course, perception will play a part. That is educated perception.

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.

 

[Underwater Tourist]

60m is too damn deep and the 100’ dir limit is too damn conservative

Freaks who say that you need helium for 30m/100ft dive are literally the same freaks who want to dive to 60m/200ft on air, just on the other side of the spectrum

 

[old frogman]

Okay, I will try one response today as I have a busy day.

Using this shipwreck as an example of as an example of how it is safe to dive air to such depths is invalid due to the additional equipment involved (using a wet bell to transport people up and down does increase safety), the shipwreck max depth was at 61 meters up to 44 meters. That is quite a range where the gas density changes quite a bit.

You should spend some time looking at some of the readily available information on the internet. @iliketopetsharks provided a PDF article from which that screengrab came.

Now, you can thump your chest and tell us how you are a Andrew Tate-like alpha male doing dives that the average person will defecate in their drawers here on Scubaboard, but you won't be the first.

Nor last.

Mate, stop clutching at straws.

 

[old frogman]

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View attachment 909256

What operational needs do you have to go recreational scuba diving?

You want to talk about 190 being the max limit, but the normal operational limits are <130ft no decompression diving.
Do you have a chamber on site for those dives deeper than 100ft?

Chamber if for treating decompression not narcosis. Chamber on site is when divers are on decompression schedules that go beyond the limiting line on decompression tables.

Consequently, whether you are on air, heliox, trimix, etc. If you are on a decompression schedule that goes beyond the limiting line on the tables, regardless of depth there has to be chamber on site at immediate notice.

Many amateur divers on rebreathers do 2-3 hours underwater, in some cases in remote locations far, far away from a recompression chamber. Wonder what the DIR Brigade has to say about that in their precious standards?