This mine was my first encounter with the risks involving such mission down there. As u can see on the picture the O2 was at some point only 15%. I walked until 13% to see if it would get better but the further I went the worse it got. At some point u don’t even realize whats going on u get really confused and it’s hard to think what u need to do to get out.
Effects of Oxygen-Deficient Exposure
Oxygen concentration Health effects of persons at rest
19 Some adverse physiological effects occur, but they may
not be noticeable.
15–19 Impaired thinking and attention. Increased pulse and
breathing rate. Reduced coordination. Decreased
ability to work strenuously. Reduced physical and
intellectual performance without awareness.
12–15 Poor judgment. Faulty coordination. Abnormal fatigue
upon exertion. Emotional upset.
10–12 Very poor judgment and coordination. Impaired
respiration that may cause permanent heart damage.
Possibility of fainting within a few minutes without
warning. Nausea and vomiting.
<10 Inability to move. Fainting almost immediate.
Loss of consciousness. Convulsions. Death.