At five meters depth (1.5 bar absolute pressure), pure oxygen becomes toxic after ten-15 minutes or so already. After an hour or two, the effects can set in at snorkeling depth. That makes it rather not useful for any diving purpose. For continued exposure, the partial pressure of oxygen should be kept below 0.6 bar.

For medical use, high oxygen partial pressure can be useful, although I belive there is some discussion about how useful it actually is. Very few things in medicine have no drawbacks and dangers.

At five meters depth (1.5 bar absolute pressure), pure oxygen becomes toxic after ten-15 minutes or so already. After an hour or two, the effects can set in at snorkeling depth. That makes it rather not useful for any diving purpose. For continued exposure, the partial pressure of oxygen should be kept below 0.6 bar.

For medical use (hyperbaric medicine), high oxygen partial pressure can be useful, although I belive there is some discussion about how useful it actually is. Very few things in medicine have no drawbacks and dangers.

At five meters depth (1.5 bar absolute pressure), pure oxygen becomes toxic after ten-15 minutes or so already. After an hour or two, the effects can set in at snorkeling depth. That makes it rather not useful for any diving purpose. For continued exposure, the partial pressure of oxygen should be kept below 0.6 bar.

At five meters depth (1.5 bar absolute pressure), pure oxygen becomes toxic after ten-15 minutes or so already. After an hour or two, the effects can set in at snorkeling depth. That makes it rather not useful for any diving purpose. For continued exposure, the partial pressure of oxygen should be kept below 0.6 bar.

For medical use, high oxygen partial pressure can be useful, although I belive there is some discussion about how useful it actually is. Very few things in medicine have no drawbacks and dangers.