This is a crazy one, folks! I had some scuba theory I had to learn, and I think drawing it all out helpped me remember the principles.
I accidentally drew on both sides of this paper. Marker bleeds through this brand of drawing pad so no colors this time!
I didn’t even get to the Haldanean Model before I ran out of time. I had a limited amount of time I could study, and drawing was just taking too long!! Modern recreational dive planning tables are based on a LOT of research and theory developed over decades. Haldane was a man who theorized that different organs in our bodies absorbed and released gas at different rates, when put under pressure. Lungs absorb a lot of gas fast; brains are the opposite and take up gas relatively slowly.
Ol’ Hal (that’s my nickname for him now) made a chart and some calculations for determining how fast a diver will become saturated with gas (nitrogen gas for example) and how quickly the diver will release that gas.
This information isn’t very practical. Nobody needs Haldeanean (how many different ways will I incorrectly spell this…?) tissue compartment gas saturation tables to dive. You can use your dive computer and/or dive tables that someone else already programed and designed.
It’s probably useful to know because understanding the theory and details behind why something works can help a person understand the whole thing better. Or maybe someone at PADI really likes Ol’ Hal and doesn’t want his name to be forgotten. Maybe it’s both!
Open Water Saga 