Most welcome! I can talk endlessly about diving so welcome the question.
I added an edit with some more information incase you're more curious.
Are there other gasses that could be used. E.g some of the noble gasses like argon or neon?
Ah very interesting, and yes theoretically I believe. Some people are experimenting with other gases due to the price and low availability of Helium.
Rebreathers are becoming a lot more accessible these days and so are making dives much cheaper, but they're still $20k so it takes a while to recoup the cost.
Most welcome! I can talk endlessly about diving so welcome the question.
I added an edit with some more information incase you're more curious.
Are there other gasses that could be used. E.g some of the noble gasses like argon or neon?
Ah very interesting, and yes theoretically I believe. Some people are experimenting with other gases due to the price and low availability of Helium.
Rebreathers are becoming a lot more accessible these days and so are making dives much cheaper, but they're still $20k so it takes a while to recoup the cost.
https://www.wikipedia.org/wiki/Argox
Hydrogen is used at extreme depths, but isn't so good at moderate depths, and has its own issues, like being flammable as all fuck