[tiewrapdiver]

Hi guys,

I'm teaching the oxygen and human phsyiology lecture and i'm a little confused with tracking the UPTD's.

It says that the UPTD's dont clear until the end of the dive period and a 24hr break, and that the maximum allowed is 300 in any 24hr period.

Does this mean that UPTD's for a dive will clear after 24hrs or that will they still count until all diving has stopped for 24hrs?

Thanks,

Tim