#4586
Jen-Michael - 7/07/2008 4:52 PM
I think it’s been mentioned above but it depends on how deep you were, I’m sure your first few dives weren’t as deep as your more recent ones. Enter Boyles Law, the pressure-volume relationship. Your lungs are flexible containers and so as you go deeper the amount of air required to fill them increases, as you have to overcome the pressure pushing in on them. So you don’t need to find out your SAC, but rather you RMV. Your SAC rate is only good for the depth you were at when you made an effort to calculate it. An RMV is good for all depths because when you use it to plan dives it takes into account the depth. Ex. .6cuft/min/ATA. You should be able to find an RMV calculator online.