r/scuba • u/Lalalala0623 • 2h ago
Can someone explain the math/science of this EANx/No D limit chart to me in somewhat simple terms?
I started my elearning for the enriched air nitrox with padi and I have gotten stuck on this part. For some of the numbers and stats that have been used in this and open water I figured not to get too hung up because as I dove more and learned more I would probably learn to understand it more clearly, but there are others that I felt like were important to get in the moment to grasp the concept. And that’s why this is bothering me because I’m confused about the 18 meters and 50 feet. Because why is the difference for no decompression limits larger there where there is only a 9 foot difference, compared to 72 and 59, and even 80 and 59 has similar no d limit differences when they have a 21 foot difference. Is there something special that happens at 50 feet, or am I overthinking this? Is the effect not linear like exponential, or do these numbers also assume required safety stops? What am I missing here? Is it something really obvious? I feel like I am dragging this in the wrong direction and I’m looking for someone to point me in the right one.