Titanic submersible es morte

And yes this is about the worst thing I could think about happening.

As someone who has used SBA at work, your air doesn’t last half as long if you are breathing hard from stresses. You have to practice to slow your breathing to save air. If their air is calculated at 40 hours left you can bet by now they have burned half of that from the sheer panic and uncontrolled emotions going on.

It may be time for thoughts and prayers. It may be their only hope.
When the useable oxygen is gone, they will simply pass out. It's somewhat similar to what happens at altitude when there is loss of cabin pressure and everyone goes to sleep; i.e. the recent jet crash in Virginia where the pilot was seen slumped over in the cabin. That's the only 'mercy' that can come from this scenario. The worse part will have been the realization of their situation while here was still plenty of breathable air still in the crew compartment. That was a mind game for all of those poor souls that is hard for any of us to contemplate.