Both systems in one plus color coding–I like it
Today’s topic in our series ‘Guide for the Metrically Impaired’ is tank pressure. Those of us familiar with the Imperial system measure tank pressure in psi while the rest of the world uses bar. So if the divemaster says that you need to turn around and head back to the boat when you have 125 bar, or you need to be back on the boat with 50 bar, how do you comply if your gauge is in psi? Most importantly, listen to the dive briefing and pay attention to the guidelines and hand signals. Here are some handy conversions:
Full tank 3000-3200psi 200-250 bar
Turn-around point or start
ascending to a shallower depth 1000-1250 psi 100-125 bar
Safety stop / low on Air 750 psi 50 bar
Low on air / Very low on air 500 psi 30 bar
