The time & the depth. The water temperature & the water visibility. The buttocks & the legs of my buddy.
Like a yoyo: up and down constantly. shallow at the beginning, and deep at last. Deep at the beginning, and progressively shallower.
Shallow dives at first, and deep dives at last. Deep dives at first, and shallow dives at last. Whatever.
You stop your ascend and you stay for 3 minutes at 5 meters depth before ending a dive. This is a stop to allow you to urinate in the diving wetsuit. This is a stop of 3 minutes at 5 meters when descending.
be at a depth of 10 meters around 80 bars and be at 5 meters depth around 50 bars. wait the last minute and to ascend straight to the surface. finish completly the scuba tank without surprise.
12 hours in both cases. 6 hours before sport and 24 hours before flying. 24 hours before sport and 6 hours before flying.
I continue to dive. I stop to dive and I get out the water. I continue till I can't bear the cold anymore and then, I get out of the water.
I continue to swim here and there. I quit my buddy and I swim toward the surface. I stop all activity, I stand to my buddy or on something, I rest myself and I breathe out deeply.
I never fight against. I think and I adapt. No problem, I simply swim stronger. I don't pay attention and I pray for the rescue team to find me.
Always dive with an instructor. Never dive alone. Always dive with a dive center.