Can you use the oxygen trick to practically extend snorkelling dives?
I used to do a little scuba, but overall didn't like the reliance on often poorly maintained kit. But I do love snorkelling - the lightness and simplicity of it.
Can I breathe pure oxygen for half an hour on the boat and be able to repeatedly snorkel longer?
I used to do a little scuba, but overall didn't like the reliance on often poorly maintained kit. But I do love snorkelling - the lightness and simplicity of it.
Can I breathe pure oxygen for half an hour on the boat and be able to repeatedly snorkel longer?