Quote: (Originally Posted by PCDiver)
Disconnecting the GCS underwater is not easy when they are pressurized. What you could do is take a deep breath from the regulator and disconnect at the same time. That should lower the pressure on the GCS with a couple of bars. Or close the tank completely, purge, disconnect and open the valve again.
APD reccomend a shutoff valve upstream of the GCS to make connecting/disconnecting easier...
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Know your PPO2, Pre-breath, Use checklists, Validate cells at 6mtrs, Use pure O2 at or near surface, Use a BOV, Don't dive Solo, Change Slime and Cells as recommended by Manufacturer and RTFM!
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