Average Gas Consumption

[diver0008]

50 minutes typically leaves me about 500 psi upon surfacing with a 3,000 psi AL100.

How does that work out?

 

[Kevrumbo]

50 minutes typically leaves me about 500 psi upon surfacing with a 3,000 psi AL100.

How does that work out?

That's roughly my cold water nominal RMV of 22 liters/bar per ATA and 1.7 bar/min per ATA usng the "Aluminium" 100 tank (13 liters/bar metric cylinder rating). A typical Southern Cal offshore dive in 15deg C water temp at an ave depth of 18 meters. . .

 

[Shotmaster]

50 minutes typically leaves me about 500 psi upon surfacing with a 3,000 psi AL100.

How does that work out?

You didn't list your dive depth. But you burned 83 cuft, In 50 mins =1.6 cfm. I will compute it using an average of .55, I calculate your dive depth at 63 fsw. If your dive depth is more shallow, your air consumption number heads towards .8 quickly.

 

[JBFG]

I only started to calculate my RVM this year. I'm pretty consistent between 0.61 to 0.65
I'm pretty happy with this in cold water.

 

[Insta-Gator]

Using an AI computer makes it easy to monitor. My min is 0.39, my working max is 0.96, my median planning rate is 0.45.

 

[rhwestfall]

depending on the dive, mine will runs from 0.6 - 1.0. Hardly able to represent that in the poll. Averaging the data set means nothing as the types of dives change the data (drift, warm, shallow, cold, deep, deco, good/bad vis, boat/shore, etc.) ...

 

[scubadada]

depending on the dive, mine will runs from 0.6 - 1.0. Hardly able to represent that in the poll. Averaging the data set means nothing as the types of dives change the data (drift, warm, shallow, cold, deep, deco, good/bad vis, boat/shore, etc.) ...

average RMV is average RMV, over all your normal dives

 

[scubadada]

57 responses to the poll so far, looks to be a reasonable normal distribution with a little over 60% of divers with a RMV of between 0.40 and 0.59. Despite the caveats for the poll, I find the results interesting. I hope there are more participants.

 

[scubadada]

There is an imperial-metric conversion posted below the poll on page 1 to facilitate posting:

1 cu ft = 28.3 liters
1 liter = 0.035 cu ft

< 0.3 cu ft/min = <8.5 l/min
0.3-0.39 cu ft/min = 8.5-11.0 l/min
0.4-0.49 cu ft/min = 11.3-13.9 l/min
0.5-0.59 cu ft/min = 14.2-16.7 l/min
0.6-0.69 cu ft/min = 17.0-19.5 l/min
0.7-0.79 cu ft/min = 19.8-22.4 l/min
0.8-0.89 cu ft/min = 22.6-25.2 l/min
0.9-0.99 cu ft/min = 25.5-28.0 l/min
>1.0 cu ft/min = >28.3 l/min

 

[islanddream]

Maybe someone will help me understand the SAC Rate my Aeris XR2 download program calculates. Here's the info from dive #257 in 78 degree water:

I was wearing a non-neoprene Sharkskin suit with 6 lbs. of lead.

Cylinder: Faber Steel 80
Cylinder Size: 2.8 FT 3 (The 3 is in very small print nest to the top right side of the T)
Working Pressure: 3500 PSI
Dive Time: 53 minutes
Average Depth: 62.17 FT
Start Pressure: 3700 PSI
End Pressure: 800 PSI
FO2: 36%
SAC Rate: 0.015 FT3/min. (the 3 is in very small print next to the top right side of the T)

I believe the FT3 next to the cylinder size and next to the SAC Rate is what's confusing me. Do I need to do some kind of math to get a SAC rate that makes more sense? In using AL80's, my SAC rate is usually somewhere between 33-38.

I've gone to the Aeris manual and can't find the info I need. Can someone help me, please?