Reverse Profiles Let's Take A Look

[@bryanshawcpasc]

You just proved a point often taught but never justified. Good stuff!

[@johnraymond7189]

great material Brian.

[@LakeHickoryScuba]

Thank you John Raymond, glad you liked the video.

[@tazccl]

Great video thanks for sharing.

[@LakeHickoryScuba]

tazccl Your Welcome

[@leemoore8154]

That all makes sense, but I think it's helpful for people to understand why this happens instead of just "you should do it this way because that's what the charts say." When you're sitting on the surface with extra nitrogen in your body, your body is trying to get back to equilibrium (normal nitrogen levels). The further a system is from equilibrium, the faster it is able to move towards equilibrium. So when you have more nitrogen in your system, your body can get rid of that nitrogen at a faster rate. When you're planning two dives like this, the total nitrogen loading is basically the same, since your depth and time is the same regardless of the order. So the difference is all about how much nitrogen you can off gas during your surface interval. And the way to do that is to have more nitrogen in your system at the beginning of your surface interval, which means doing to deeper dive first.

[@LakeHickoryScuba]

Some what accurate. The biggest issue is, no two divers are identical. We all have fast and slow tissues, which causes faster and slower on gassing and off gassing rates. The Tables and Computer Algorithms compensate by giving us a general base line model. Nothing more, nothing less. At the end of the day, divers should remember to always plan their dive and dive their plan.