I am new the sport of diving and for that matter discussion groups, as this
will be my first.  Is total bottom time also kept as a running total (like
logging flight hours) or does it go back to zero after SIT of 12 hours or
more?

Will he need to do deco?
http://news.bbc.co.uk/cbbcnews/hi/newsid_4960000/newsid_4965600/4965664.stm

I am thinking of doing another run, because three of the people who got some
of last ones have worn them out, and asked if/when I could do some more of
them.
Anybody in?