There is only one way to open the air way: Pull the head back. A chin in the chest postion closes the airway.
This is a physiological fact and not dependent on how one is aligned to the stars (or the surface).
The airway must be open to let expanding air to escape and not cause a burst lung.
If the mouth points up, then air can escape and water enter.
If the mouth points down, then excessive/expanding air can escape, but water does not enter.
Just put a glass upside down in the water and see.
Don't blame me for the deaths of your friends, if they get a burst lung, as some bubble somehow cannot exit. Seek expert advice instead. No. Not from this forum.
Unconscious diver = body recovery - unless it's a freediver, they practice drowning on a weekly basis
This is a physiological fact and not dependent on how one is aligned to the stars (or the surface).
The airway must be open to let expanding air to escape and not cause a burst lung.
If the mouth points up, then air can escape and water enter.
If the mouth points down, then excessive/expanding air can escape, but water does not enter.
Just put a glass upside down in the water and see.
Don't blame me for the deaths of your friends, if they get a burst lung, as some bubble somehow cannot exit. Seek expert advice instead. No. Not from this forum.
Unconscious diver = body recovery - unless it's a freediver, they practice drowning on a weekly basis