MobiDecoPRO is a professional dive planner specifically designed for
mobile
phones or portable devices. It uses the Erik Baker's m-value gradient
calculations and the Buhlmann ZHL16-B decompression model to compute

I have in my basement a Nemrod regulator, Nemrod bouyancy compensator,
USD 80 cubic foot cylinder with J-valve, a pressure guage attached to
the regulator and a few related items. The equipment was new circa
1979, but has not been used since around 1983. After watching "Jaws"

More working time is spent every year sitting in front of a computer
terminal or on the telephone, followed by driving home or sitting in a
train. At home, the temptation is greater than ever before to sit in
front of the widescreen television, with its superb picture and sound,

Hey guys!
What are the laws/regulations concerning "hydrostatically testing  tanks"
According to the DOT  they are required to be tested every five years..as we
are led to believe.