Fish_Whisperer
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Slowing ascent rate, the closer to the surface you get, is because of Boyle's Law and its affect on the nitrogen bubbles, correct?
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Thalassamania:A routine stop for 3 minutes at half your dive depth (plan or no plan, slate or no slate) will do you much more good than blowing off everything that's left in your tank at 15 feet or less.
I don't think so. When I'm coming up a mooring line, I'll count "one thousand one, one thousand two" for each foot about 60 ft - and that is creeping. On swimming ascents, I watch the variable ascent rate on my Oceanic computer and try to keep it in the 2-3 bubble range.Just curious, we cant change the ascend rates in our dive computers.
How then can we gauge this 20ft/min?
Yep - in addition to very slow ascents, I like a deep stop, safety stop, shallow stop like yours for a minute or two anyway after the safety stop, then floating effortlessly on the surface for a minute or two before climbing a ladder - which is another fast off-gassing level to consider.redhatmama:Well, yes, you can ascend too slowly from depth. And if your plan calls for deep stops, you had best be following the plan on your slate. My point was that from 15 feet to the surface, there is no reason not to take a lot of time to offgass as that is where the fastest rate of offgassing will occur.
akbpilot:My wife and I did a Padi course in January, books stated 60 ft/min max ascent rate. One person in class had to wait a session to receive her books, as a fresh batch was coming in. Her's used 60 ft/ min also. Our instructor made a point of saying that was a "max", and slower was better. Safety stops were also "strongly urged", and simulated at 5' inthe pool. OW dives with another PADI shop always used a safety stop @ 15' partly to instill it in us, and partly to send up a marker, and check for boat traffic before finishing ascent.
What works for me is that when I start my final ascent I make a judgement call about how long of total ascent time is appropriate.uglyredshoes:Just curious, we cant change the ascend rates in our dive computers.
How then can we gauge this 20ft/min?
Fish_Whisperer:Slowing ascent rate, the closer to the surface you get, is because of Boyle's Law and its affect on the nitrogen bubbles, correct?