raider11
Contributor
I´ve been reading the forum and other websites and I want to confirm if I´m doing my calculations correctly. Just to be sure I´m doing things right before getting in the water.
I don´t have to much experience, but this is a typical profile for me:
Al80 (Serv.Pres.3000)
PSI used: 2000
Total time: 45min
Depth: 33f (2ATM)
SAC: 0,59 ((2000*80)/3000)/45/2
So, if I go on a dive trip and the boat have Steel 100 with a Service Pressure of 2400 PSI, knowing that my SAC is 0,60 ft2 and the depth 100f / 4ATM (I´m not AOW but just an example), using the rule of thirds I should be on my way up when I hit 800PSI and my bottom time should be arround 28 min.
Steel 1000 (Serv.Pres.2400)
Depth: 100f
Gas at 1 ATM 100*0,6 = 168,75 min
Gas at 4 ATM 100*0,6/4 = 42,18 min
2/3 to go down and dive = 28 min at 100f (ideal, but less in reality)
1/3 to ascend
Is this OK? Should I plan for a 20 min at the max depth just to be on the safe side?
I´m a newbe trying to learn to be safe, so feel free to give me any advise you want. I know I´ll learn this in future courses, but I read about it in the forum and think it´s something we should learn in OW, not tec courses.
Thanks a lot and excuse my english, I don´t practice too much my writting skills.
I don´t have to much experience, but this is a typical profile for me:
Al80 (Serv.Pres.3000)
PSI used: 2000
Total time: 45min
Depth: 33f (2ATM)
SAC: 0,59 ((2000*80)/3000)/45/2
So, if I go on a dive trip and the boat have Steel 100 with a Service Pressure of 2400 PSI, knowing that my SAC is 0,60 ft2 and the depth 100f / 4ATM (I´m not AOW but just an example), using the rule of thirds I should be on my way up when I hit 800PSI and my bottom time should be arround 28 min.
Steel 1000 (Serv.Pres.2400)
Depth: 100f
Gas at 1 ATM 100*0,6 = 168,75 min
Gas at 4 ATM 100*0,6/4 = 42,18 min
2/3 to go down and dive = 28 min at 100f (ideal, but less in reality)
1/3 to ascend
Is this OK? Should I plan for a 20 min at the max depth just to be on the safe side?
I´m a newbe trying to learn to be safe, so feel free to give me any advise you want. I know I´ll learn this in future courses, but I read about it in the forum and think it´s something we should learn in OW, not tec courses.
Thanks a lot and excuse my english, I don´t practice too much my writting skills.