Dr Simon Mitchell shows us the first official Rebreather Hydrogen Deep (Technical) Dive in New Zealand.
Trimix to 245m and Hydrogen to about 200m.

Looks promising and how, under pressure, us Humans can breath different gases.

Interesting stuff. Bit of a 'bang' at the end too.
https://www.youtube.com/watch?v=skL5EQa8DFY

Desert.

Becky Schott diving inside a Glacier for some dangerous beauty.

https://www.bing.com/videos/riverview/relatedvideo?&q=becky+kagan+schott+-+seiko&&mid=75F5615FB59703BAA4CD75F5615FB59703BAA4CD&&FORM=VRDGAR

Hi JaSin,
that sounds dangerous -
mixing Hydrogen with Oxygen under pressure and breathing it in.

Internal combustion engines explode such mixtures using compression.
Diesel engines don't even require a spark.
There is a chance that someones lungs would explode.
I know it's only 4% oxygen and they say that's safe - but still
- under high pressure at 250 meters deep?
Oxygen and Hydrogen want to combine to form water -
they can breathe it in - not me.   :-/

bump

Don't be surprised if Humans need to breath these types of Gas mixtures to walk upon other planetoids and deal with their pressures and temperatures.

Humanity will never be able to exist out there among other worlds, until it can live 'under water'. Pretty simple.

Jasin wrote on Dec 3^rd, 2023 at 12:06pm:

Don't be surprised if Humans need to breath these types of Gas mixtures to walk upon other planetoids and deal with their pressures and temperatures. Humanity will never be able to exist out there among other worlds, until it can live 'under water'. Pretty simple.

You breathe it in - not me.     ;D

Have you ever been 'narked' with excessive Nitrogen?
More nitrogen than in the air you breath on the surface?

Mixed Gases are normal as they compensate in the environment that you are not normally in.

Jasin wrote on Dec 3^rd, 2023 at 1:33pm:

Have you ever been 'narked' with excessive Nitrogen? More nitrogen than in the air you breath on the surface? Mixed Gases are normal as they compensate in the environment that you are not normally in.

No -
I went to a dive shop when I was about 15 years old.
I wanted an air bottle and a regulator but they wouldn't sell me one.
They said I needed to pass a recognised diving course to buy one.
I only wanted to go to a maximum of 3 meters depth to get shellfish.

I already had a good mask and flippers.
I was quite a good freediver!

Being 'Narked' is the Rapture of the Deep.
The majority of biomass of all the planet live in that Zone.
Well, it used to. Probably all fished out by now.

The Dive Shop was probably afraid you would be like Monk.
They give you a metre, but you take a mile.  :D

Jasin wrote on Dec 3^rd, 2023 at 2:39pm:

Being 'Narked' is the Rapture of the Deep. The majority of biomass of all the planet live in that Zone. Well, it used to. Probably all fished out by now. The Dive Shop was probably afraid you would be like Monk. They give you a metre, but you take a mile.  :D

Maybe it's the law? -

they can't sell that stuff to anyone?

Not if you can't prove you're 'trained' by a Provider and have the Cards to prove it, as well as being of young age, you have a second person or more who is also 'certified' to accompany you.
No Shop or business would like to sell your soul to the devil and the deep blue sea. Bad enough Adults and 'certified' ones at that, can die in the Underworld.

Jasin wrote on Dec 3^rd, 2023 at 2:48pm:

Not if you can't prove you're 'trained' by a Provider and have the Cards to prove it, as well as being of young age, you have a second person or more who is also 'certified' to accompany you. No Shop or business would like to sell your soul to the devil and the deep blue sea. Bad enough Adults and 'certified' ones at that, can die in the Underworld.

Yes and in fact there were laws about using aqualungs to dive for shellfish -
it's not legal everywhere either.  :-[

Makes you wanna hold your breath, eh?

Jasin wrote on Dec 3^rd, 2023 at 2:58pm:

Makes you wanna hold your breath, eh?

yes and be a freediver.

Bobby. wrote on Dec 3^rd, 2023 at 3:53pm:

Jasin wrote on Dec 3rd, 2023 at 2:58pm: Makes you wanna hold your breath, eh? yes and be a freediver.

Well then.
You must make FD your new 'Master'.  ;) :D

Jasin wrote on Dec 3^rd, 2023 at 5:33pm:

Bobby. wrote on Dec 3rd, 2023 at 3:53pm: Jasin wrote on Dec 3rd, 2023 at 2:58pm: Makes you wanna hold your breath, eh? yes and be a freediver. Well then. You must make FD your new 'Master'.  ;) :D

There is only 1 master on Ozpolitic -  master Light.   :)

Well then you'll drown.  ;D

Jasin wrote on Dec 3^rd, 2023 at 5:55pm:

Well then you'll drown.  ;D

He forgave all our sins -
therefore we can go to heaven if we have a scuba accident.

You obviously don't need to go 40m deep to be Narked.

Quote:

The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F).

—wiki

Jovial Monk wrote on Dec 3^rd, 2023 at 6:15pm:

Quote: The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). —wiki

You're not invited. Get lost.  ;D

Jovial Monk wrote on Dec 3^rd, 2023 at 6:15pm:

Quote: The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). —wiki

What about when compressed?
That's how diesel engines ignite gases.

Don't encourage him to come back here.
What's wrong with you?

Bobby. wrote on Dec 3^rd, 2023 at 6:32pm:

Jovial Monk wrote on Dec 3rd, 2023 at 6:15pm: Quote: The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). —wiki What about when compressed? That's how diesel engines ignite gases.

What pressure is it in a diesel cylinder when the gases ignite?

Bobby. wrote on Dec 3^rd, 2023 at 2:00pm:

Jasin wrote on Dec 3rd, 2023 at 1:33pm: Have you ever been 'narked' with excessive Nitrogen? More nitrogen than in the air you breath on the surface? Mixed Gases are normal as they compensate in the environment that you are not normally in. No - I went to a dive shop when I was about 15 years old. I wanted an air bottle and a regulator but they wouldn't sell me one. They said I needed to pass a recognised diving course to buy one. I only wanted to go to a maximum of 3 meters depth to get shellfish. I already had a good mask and flippers. I was quite a good freediver!

This would be OK for shallow dives for shellfish.

Don't need PADI cert many boat owners have this.

https://www.spareair.com/

True Baron. Pretty handy to have if you're silly enough to have your Crayfish jam your hand against rock when trying to make it lunch.

Around Sydney. Always use a metal L-shape prodder for small rocky underhangs. Those Blue-Ringed Occys have a nasty fast lunge capacity to bite.

The compression of gas causes heat, that is what ignites fuel in a Diesel.The slow compression in diving and the heat absorbing human body in the cool water would make compression ignition inviable. ever put your finger on the end of a bike pump and pumped it? 

Jovial Monk wrote on Dec 3^rd, 2023 at 9:11pm:

Bobby. wrote on Dec 3rd, 2023 at 6:32pm: Jovial Monk wrote on Dec 3rd, 2023 at 6:15pm: Quote: The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). —wiki What about when compressed? That's how diesel engines ignite gases. What pressure is it in a diesel cylinder when the gases ignite?

From memory it's about 16 to 1.

So 16 atmospheres = 240 Lbs per square inch.

Setanta wrote on Dec 3^rd, 2023 at 9:31pm:

The compression of gas causes heat, that is what ignites fuel in a Diesel.The slow compression in diving and the heat absorbing human body in the cool water would make compression ignition inviable. ever put your finger on the end of a bike pump and pumped it?

(P1V1)/T1 = (P2V2)/T2

Jasin wrote on Dec 3^rd, 2023 at 9:17pm:

True Baron. Pretty handy to have if you're silly enough to have your Crayfish jam your hand against rock when trying to make it lunch. Around Sydney. Always use a metal L-shape prodder for small rocky underhangs. Those Blue-Ringed Occys have a nasty fast lunge capacity to bite.

I need to train my dog to do this   ;)

https://www.youtube.com/watch?v=coEhzByskRE

Portuguese WaterDogs are far better at diving underwater.
They also have the proper coat for such conditions.

Jasin wrote on Dec 3^rd, 2023 at 9:45pm:

Portuguese WaterDogs are far better at diving underwater. They also have the proper coat for such conditions.

The Labrador did well though:


https://www.youtube.com/watch?v=coEhzByskRE

It did.
Poor Labradors. Humans put them through so much.
I bet they dream of being wolves in the wild and free.