Posted by MHK on September 05, 2001 at 12:33:56:
In Reply to: Monitoring air . . . and . . . how much at depth? posted by Ken Kurtis on September 05, 2001 at 12:19:14:
One of the things that we say in the DIR philosophy is that everything on your right side is primary [ ie; valves, inflation source and pocket contents] and everything on your left side is back up [ back up reg, SPG, pocket content] and one of the things we mean by that is that by running your SPG off your left post it's a back up because your primary SPG is in your head.. I re-printed below an excerpt from the GUE fundamental manual respecting gas management..
How effectively do you manage your breathing supply?
New Diver
-Always able to return to the boat with minimum supply requested (usually 500-750).
-Never run low on breathing supply and monitor dive buddy’s supply.
-Able to guesstimate cylinder supply prior to looking at gauge (within 500psi/35bar).
Advanced Diver
-Always able to return with desired reserve supply and never run low on breathing supply.
-Able to guesstimate cylinder supply prior to looking at gauge (within 300psi/20bar).
-Understand and are able to calculate the 1/3 rule for gas management.
Advanced Technical Diver
-Always able to return with desired reserve supply and never run low on breathing supply.
-Able to guesstimate when 2/3 of breathing supply is depleted (within 200psi/13bar).
-Familiar with dive buddy breathing supply and able to guesstimate within 200psi/13bar.
-Intimately familiar with 1/3 rule for gas management and able to adjust for dissimilar tanks and various conditions while in the water.
-Familiar with stage and decompression tank air rules and able to adjust relative to activity.
Later