Passed my A.O.W. Yay! Question on SAC Rates

[DiveRef]

I completed my Advanced Open Water dives this weekend, Got home and downloaded my Logs from my computer and was going over my SAC Rates, I was .820-1.004, What is a typical Average SAC rate?


Thank you
Gary

 

[tursiops]

What sort of diving was it? Currents? Low viz? Dry suit? Gear config? (Tank sizes, etc)

 

[decompression]

Very general, you could use .6-7 as an average for swimming, .4-5 for rest/deco. Emergency is 1.0.


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[kelemvor]

Too many variables including the diver. Since I was diving an AI computer for a long time I've got loads of air consumption data for myself. It will vary greatly from moment to moment on a dive depending on what you're doing. It will also vary greatly from person to person. One of my dive buddies is a female with fewer dives than I've got. However our pressures stay similar when she dives a Al63 and I dive a big LP108... Women breathe less hot gas, I guess.

What do your logs from previous dives show (or did you just get the AI computer this past weekend)?

 

[DiveRef]

I have only dove the AI for this weekend all others were in Pool, very relaxed not much movement just hovering .50-.70 SAC. This was at Lake Phoenix, Full Wetsuit, HP133, dives were about 25-30 min long, the Highest consumption was the Deep Dive, and the wreck, The wreck I could understand with the wreck reel tying it off and un winding it etc, but the deep we basically dropped down stayed on bottom (51 Deg) for a few minutes did the tasks and came back up with a safety stop. Must have been more stressed than I thought. I look forward to keeping track of this now, as it prints off every time I do a dive with the AI computer.

 

[Basking Ridge Diver]

Just know you do not need an AI Computer to track RMV/SAC - my wrist computer does the same but I must mark starting and ending pressure in the software download to my PC.

As well there are excel formulas you can use to figure it out too - but I let my PDC do the work.

 

[tbone1004]

BRD, don't need AI, but your computer must have average depth in the readout, no DG03 or Zoops etc.

OP, the SAC rate you posted is what I would consider "normal" for that scenario considering you're a new diver.

0.35 is my deco/relaxing SAC, 0.45-0.6 is kicking around depending on current/work load, and 1.0 is what I use to plan for to make sure I have enough. Your SAC will come down with time, for most people it levels off around 0.6 for a full dive average. I try my SAC for every dive, computer spits out total dive time and avg depth, I have total gas used, and crunch the numbers. I find this is something that too many divers don't do, but it provides a lot of information about the dive. I like the grand total because it averages everything out, and tells me if I was comfortable, uncomfortable, diving new gear, etc etc. Says a lot about how you were feeling and if you get enough data, you can use that to predict what your SAC will be like which helps with planning dives.

 

[rongoodman]

One of my dive buddies is a female with fewer dives than I've got. However our pressures stay similar when she dives a Al63 and I dive a big LP108...

Just remember that she's carrying your emergency gas in that little tank, so don't get to hung on comparable pressures, as opposed to gas volume.

 

[wKkaY]

BRD, don't need AI, but your computer must have average depth in the readout, no DG03 or Zoops etc.

The zoop does show average depth.

 

[tbone1004]

ahh, thanks for correction, I had used one of the original and it didn't show it, must have been a firmware upgrade.