what's your sac?

[doole]

Thought it would be fun to compare.

If you don't know how, you need a tank, (not empty, obviously) a reg with a pressure gauge and some sort of timer. (A watch will do.) Get relaxed, sit there, start timing and breathe through the reg until you've made enough of a dent in the tank to register accurately on your gauge.

Now, calculate how many cubic feet of air you just breathed and divide it by how many minutes you took to do it. That's your sac.

 

[FIXXERVI6]

I thought .30 was insanely low SAC, or am I wrong.

 

[wheezy]

I was gonna say somethin dirty... but I won't...

huh?!?
I thought I was doing good for a 6'5" 230lb guy. I guess I should go buy some doubles.... darn it. I admit I am definately an air hog... looking back at computer profiles... I seem to average around .5 - .6 with my lowest ever at .43 (on a 35foot dive)

What depth is the correct depth to measure at? Obviously the deeper you go, the Higher you SAC will be.

:thinkingo

 

[DeepScuba]

UH oh, you guys are about to get flamed large...........

 

[doole]

I was gonna say somethin dirty... but I won't...
What depth is the correct depth to measure at? Obviously the deeper you go, the Higher you SAC will be.
:thinkingo

Wheezy:

'SAC' is Surface Air Consumption, so your depth should be whatever it is in your living room.

 

[DFC5343]

Movin from left to right...

 

[wreckchick]

looking at this link showing how to calculate SAC rate.

Sitting in your living room won't yield a useful number, IMO.

Rachel

 

[d33ps1x]

What is the point of measuring your SAC rate while relaxing and doing nothing? Is it for shooting the s*#t and boasting with instructors who do it on their knees? Diving isn't a peeing contest.

A far more useful representation of your gas usage would be your average SAC rate over a variety of dives such as high current swims right down to low arobic sitting on your ass dives. Knowing this rate is for allowing you to better and more safely plan your gas requirements for your dives.

Better and more safely...Was that ok English? Not sure. Who knows

d33ps1x
PUDLI Master Cyberdiver Instructor #000001

 

[The Fresh Prince]

Biscuit&, I think Doole is trolling.

 

[Drew Sailbum]

My SAC averages .35 for typical working dives. It's a touch lower for "just for fun" dives. Occasionally my rate is higher when chasing students.