I had a curious anomaly appear with my Suunto Cobra this past weekend that I can't understand, and I wonder if somebody here can explain this one to me.
I made a dive to a max of 79' and was having a great time all the way to the point that my buddy ran out of air on the bottom. This was the first time I had ever been diving with him, so I had no idea how reckless he was. I brought him up to the surface and got him into the boat, but then had to go back down to retreive the anchor. We had wedged it behind some rocks, so there was no way this thing could be freed from the surface. So back down I went to 71', got the anchor, then came up to 15' and hung there for 4 minutes.
What has me puzzled is Sunnto's calculation of tissue saturation percentages. They only show 9 tissue compartments in the printout, and the half-times on the printout aren't labeled. Thus I can't be completely sure that the compartments correspond from one printout to another. Anyway, at the end of our dive together my computer calculated saturation levels of 50, 67, 75, 75, 65, 49, 43, 24, and 12 percent for the nine compartments. After a six minute surface interval, the computer treated my dive for the anchor as a separate dive and so calculated tissue saturation percentages at the beginning and end of that dive. The percentages at the beginning are indicated as 48, 71, 83, 84, 72, 51, 42, 24, and 12. How can this be? The saturation levels on compartments #2, 3, 4, and 5 are indicated as greater AFTER the six minute surface interval than before it. The fastest compartment dropped from 50% to 48%, which makes sense, and the very slow compartments show no change, which also makes sense. But I can't rationalize how the mid-level compartments could have become more saturated. Any explanations out there?
For reference, the calculations after I came up (with a 4 minute safety stop) show saturation levels of 30, 52, 72, 82, 76, 56, 48, 27, and 14. Those numbers seem perfectly reasonable to me, given the starting saturation levels.
I made a dive to a max of 79' and was having a great time all the way to the point that my buddy ran out of air on the bottom. This was the first time I had ever been diving with him, so I had no idea how reckless he was. I brought him up to the surface and got him into the boat, but then had to go back down to retreive the anchor. We had wedged it behind some rocks, so there was no way this thing could be freed from the surface. So back down I went to 71', got the anchor, then came up to 15' and hung there for 4 minutes.
What has me puzzled is Sunnto's calculation of tissue saturation percentages. They only show 9 tissue compartments in the printout, and the half-times on the printout aren't labeled. Thus I can't be completely sure that the compartments correspond from one printout to another. Anyway, at the end of our dive together my computer calculated saturation levels of 50, 67, 75, 75, 65, 49, 43, 24, and 12 percent for the nine compartments. After a six minute surface interval, the computer treated my dive for the anchor as a separate dive and so calculated tissue saturation percentages at the beginning and end of that dive. The percentages at the beginning are indicated as 48, 71, 83, 84, 72, 51, 42, 24, and 12. How can this be? The saturation levels on compartments #2, 3, 4, and 5 are indicated as greater AFTER the six minute surface interval than before it. The fastest compartment dropped from 50% to 48%, which makes sense, and the very slow compartments show no change, which also makes sense. But I can't rationalize how the mid-level compartments could have become more saturated. Any explanations out there?
For reference, the calculations after I came up (with a 4 minute safety stop) show saturation levels of 30, 52, 72, 82, 76, 56, 48, 27, and 14. Those numbers seem perfectly reasonable to me, given the starting saturation levels.
