Short Air Fills
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Peter_C
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dfx
Contributor
This is one of those posts I just don't understand.. 
When you look at your gauge, you are reading pressure - i.e. PSI or Bar.
You will set your turnaround / go up point at a point when the 'pressure' on your guage reads x psi / bar...
If you need more Cu/Ft (gas) because you are worried about getting less pressure in your cylinders & or want to spend longer on the bottom then I'd use a larger Cu/Ft cylinder..
When you look at your gauge, you are reading pressure - i.e. PSI or Bar.
You will set your turnaround / go up point at a point when the 'pressure' on your guage reads x psi / bar...
If you need more Cu/Ft (gas) because you are worried about getting less pressure in your cylinders & or want to spend longer on the bottom then I'd use a larger Cu/Ft cylinder..
Wookie
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It's another thread by someone who is afraid that they might be getting ripped off a little. Go to the gym every now and again and your 80 will last well past your NDL's for any dive deeper than 40 feet. Getting some buoyancy coaching will accomplish the same thing. Tech diving is a little different, but some gym time solves all short fill problems.
Wookie
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I understand that. Before I smoked, I had a 12.5 liter lung volume. Smoking quickly reduced that to about 10.5 liters. Quitting smoking left it at about 10.5 liters. You were taking in more air than you could use effectively, so you were blowing it away without use. In my experience, most divers are on the bad side of good air consumption rather than the good side of good because of their lack of fitness, not because they're too fit. Some experiences are different, of course.
halocline
Contributor
Here's what I've learned from this thread:
1. I might die if I can't do complex math while underwater
2. I need to stop exercising and start smoking if I want my dives to last longer
3. It's important to know exactly how much air I'm ripped off for at my LDS so that if I'm so much as 1 cft low, I can start loudly complaining, showing them the math while lighting a smoke right next to the filling station
1. I might die if I can't do complex math while underwater
2. I need to stop exercising and start smoking if I want my dives to last longer
3. It's important to know exactly how much air I'm ripped off for at my LDS so that if I'm so much as 1 cft low, I can start loudly complaining, showing them the math while lighting a smoke right next to the filling station
OP
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Ok, again I appreciate most of the answers I recieved to this question. I got the answer in the 1st 3 comments so I can't believe how long this keeps going. I even like the humorous answers but I have to respond to a couple morons. 1st the socialist from London that dosen't understand the question. Yes you dive with the air you have and plan accordingly. You may be satisfied with what you get and have learned not to question government or authority but but in the US some of tend to question the master plan. I should have done the math myself instead of being lazy and asking the board.
2nd to Wookie. Did you have a hard day on the Spree and were kicking back with your friend Jack D. I didn't ask how I could overcome a short fill or if going to the gym would help. I ask how the cubic feet was affected by short psi. Now I been diving long enough so 8 or 10cf short dosen't affect my NDL. Now maybe,(being the Captin) of the Spree caused you to be sensative when questioned about air fills, bad food or poor accomadations. Either you were drunk or I touched a nerve with the post. I must admit I have looked at your web site thinking about a trip someday. However by your choice of words I may go to Ft. Meyers Fl. for that trip. My car tires can get along 5lb short of air and my oil could be a qt. short with no problem either. I prefer to have a full tank of air when I pay for the air and the charter. 5 min extra time on the rope may reveal a nice picture opportunity. In closing,(I won't follow this thread any more), everyone likes a little ass but no body likes a smart ass, except maybe another smart ass. Being a boat captin you should have more class. The owner of the Spree probably would appreciate more class.
2nd to Wookie. Did you have a hard day on the Spree and were kicking back with your friend Jack D. I didn't ask how I could overcome a short fill or if going to the gym would help. I ask how the cubic feet was affected by short psi. Now I been diving long enough so 8 or 10cf short dosen't affect my NDL. Now maybe,(being the Captin) of the Spree caused you to be sensative when questioned about air fills, bad food or poor accomadations. Either you were drunk or I touched a nerve with the post. I must admit I have looked at your web site thinking about a trip someday. However by your choice of words I may go to Ft. Meyers Fl. for that trip. My car tires can get along 5lb short of air and my oil could be a qt. short with no problem either. I prefer to have a full tank of air when I pay for the air and the charter. 5 min extra time on the rope may reveal a nice picture opportunity. In closing,(I won't follow this thread any more), everyone likes a little ass but no body likes a smart ass, except maybe another smart ass. Being a boat captin you should have more class. The owner of the Spree probably would appreciate more class.
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