DIR- GUE Min gas (MGR) table?

[SaltyWombat]

Computing MGR during GUE-EDGE involves a lot of math. I'd rather just write down MGRs for various depths in my wetnotes. Does GUE publish such a table? I don't recall seeing it in my training materials.

 

[Matthijs]

I made one during class for common cylinder sizes I dive with and wrote it in my wetnotes.

 

[rjack321]

Computing MGR during GUE-EDGE involves a lot of math. I'd rather just write down MGRs for various depths in my wetnotes. Does GUE publish such a table? I don't recall seeing it in my training materials.

They don't publish one on purpose
You should know the math already to either make one yourself.

 

[SaltyWombat]

They don't publish one on purpose
You should know the math already to either make one yourself.

I have made such a table myself. I'd still like to see tables from others though.

 

[mer]

Computing MGR during GUE-EDGE involves a lot of math. I'd rather just write down MGRs for various depths in my wetnotes. Does GUE publish such a table? I don't recall seeing it in my training materials.

I'm gonna go all instructor here and answer a question with a question: why do you think GUE does NOT want to publish a fixed MG table?

In other words, what crucial bit of information should divers be tracking in order to calculate the MG for their team for a dive?

(I'm not saying that MG tables are bad --- but this knowledge above is pretty important!)

 

[SaltyWombat]

In other words, what crucial bit of information should divers be tracking in order to calculate the MG for their team for a dive?

SCR. All other quantities in the CAT formula are fixed for a given depth.

0.75 cuft/min is a reasonable estimate though.

 

[SaltyWombat]

Maybe something like this:

I used 1.5 for the consumption for 2 divers. I didn't fully think through the time to ascend for depths ending in 5. I naively assumed time = depth / 10 + 1. So the time to ascend from 75 feet is 8.5 minutes. That's 1 minute to deal with the OOG and 7.5 minutes to actually ascend. I'd likely increase that to 1 + 9 minutes if I were more clever with Excel. Of course I could enter numbers manually, but I relied on Excel formulae.

Edit: "Average depth (ata)" is better.

 

[rddvet]

I made something similar to what salty posted but with multiple different sac rates. It’s very common for fundies students to make such a chart

 

[rjack321]

0.75 cuft/min is a reasonable estimate though.

As a former DM, I think if you actually get into an OOA situation you will find this very skimpy. I have seen 1.25+cf/min for ONE stressed diver

 

[SaltyWombat]

As a former DM, I think if you actually get into an OOA situation you will find this very skimpy. I have seen 1.25+cf/min for ONE stressed diver

I think you're right. Also, 1 minute to deal with the emergency isn't a lot.