Bail Out Bottle Size - Advance Open Water

[UaVaj]

THIS IS NOT A DECO BOTTLE QUESTION.

This thread is primary looking for feedback from advance open water divers. However if you are an open water diver. You are also welcome to provide feedback.

(1) Please state your typical diving depth. (33ft, 66ft, 99ft, 132ft, 165ft, if deeper what is the depth)

(2) Please state the pony cylinder size you carry. (Spare Air , 6cf , 13cf, 19cf, if larger what is the size)

(3) Please state your total non emergency ascending gas usage from your typical diving depth to the surface. (how much gas you consumed in order to make it from the bottom to the surface safely)

(4) Have you ever had to use your bail out bottle due to an emergency (oaa, equiptment failure, etc). Please tell us the depth and if there was enough gas for you to "safely" reach the surface. Tell us your experience - feel free to be detailed.



I will go first
(1) 140' to 150' typical
(2) 23cf - faber FX23
(3) 15cf average - as high as 20cf.
(4) not yet

 

[Dsix36]

1 - Deeper
2 - 2 or more Luxfer Alum 80's
3 - SAC is .5 under normal conditions, .4 when resting on deco, and .78 when a CO2 hit is happening
4 - Only in my training classes

 

[cloudflint]

1. 20m (66ft). Max 30m (100 feet)
2. 1/2 litre "suicide bottle" built into horse collar, charged to 200 bar (2900psi) giving 100 litres(3.5 cubic feet) of air.
3. unsure of what my actual SAC is, I use 1 cubic foot a minute for calculations.
4. never had to use it in anger, ascended on it from about 20 meters as a drill and made it up with plenty to spare.

 

[krawlings]

1. 50' to 120'
2. I sling a catalina c30
3. don't know
4. have not had to . just nice to know it is ther

 

[Bubbletrubble]

(3) Please state your total non emergency asending SAC from typical diving depth.

I will go first
(3) 15cf average - as high as 20cf.

From the OP's answer to Question #3, it appears that he is looking for a total volume of air rather than a rate. I hope he can clarify this matter since the respondents thus far have replied with a rate. If the point of the exercise is to verify that the size of the bail-out bottle is sufficient, then one could confirm this by using the typical max depth and a "stressed"/emergency SAC rate.

(1) 60-80 fsw
(2) No pony
(3) 0.35 - 0.40 cuft/min
(4) No

I think the OP started this thread to see what other divers use for bail-out tank capacity beyond the bare minimum required for a given depth.

 

[fdog]

(1) Please state your typical diving depth. (33ft, 66ft, 99ft, 132ft, 165ft, deeper) All of the above
(2) Please state the pony cylinder size you carry. (Spare Air , 6cf, 13cf, 19cf, larger.)No pony (not deco obligated) -or- Fully redundant doubles (deco obligated)
(3) Please state your total non emergency asending SAC from typical diving depth. RMV = 0.45, SAC (psi/minute) depends on cylinders used
(4) Have you ever had to use your bail out bottle due to an emergency. Please tell us the depth and if there was enough gas to "safely" reach the surface. Tell us your experience - feel free to be detailed. No


All the best, James

 

[Chris12day]

1) 70 to 120 ft
2) 19 cft
3) 0.5 to 0.8 SAC
4) Not in emergency, but on descent when air was off.

Safe Diving

 

[Garrobo]

1 0-130 ft
2 13cf Catalina
3 Dunno
4 Nope. Never used it. Just for decoration.

 

[peterbj7]

What a strange question! What are you going to do with the answers? Learn how to estimate your air consumption and then work out for yourself what size bail-out tank you need.

 

[UaVaj]

From the OP's answer to Question #3, it appears that he is looking for a total volume of air rather than a rate. I hope he can clarify this matter since the respondents thus far have replied with a rate. If the point of the exercise is to verify that the size of the bail-out bottle is sufficient, then one could confirm this by using the typical max depth and a "stressed"/emergency SAC rate.

SAC is Surface Air Consumption as you all know. SAC can be either rate or amount.

I am looking for AMOUNT - what it takes for you to get from depth to the surface safely.

Yes - the point of this thread is to find out if your bail-out bottle is enough to get you from depth to the surface safely. Hence the toward the spareair.