topher10
Contributor
Yea, sorry. I had typos and not (I don't think) math issues. So I meant to write PO2 of 1.2 and 1.4 (not 1.02 and 1.04). My bad there and sorry for the confusion. I could edit the first post but probably should just leave it now to avoid further confusion. I am actually not doing math in this case because I have a pre-printed table with PO2 values for 32 and 36 at common depths, and so I just looked up the depths for 1.2 and 1.4 with 36% on my table.
The computer is an Aeris A300, which is an older and cheap computer that does everything I need. However, in NORM mode it has a series of built-in alarms related to NDL, PO2, safety stop, etc. Most of these alarms I actually like. I have not run into the PO2 alarms before because of only a few nitrox dives, but it gives a warning at 1.2 and another alarm at 1.4. I cannot turn this off in NORM, but I could swap to TECH and edit these myself. I am hesitant to do so just due to my lack of experience.
The goal of my post was to get a feel for whether keeping above PO2 of 1.2 made any sense or if that was being hyper-conservative. My general feeling is that its being hyper-conservative. For example, there is nothing uniquely dangerous about a 45-minute dive on 36% at 80 ft, especially if that is the first of only 2 dives that day, with the next dive being shallower. I think if I was doing 5 dives in a day, then maybe I would be more conservative. But I would certainly welcome other options.
The computer is an Aeris A300, which is an older and cheap computer that does everything I need. However, in NORM mode it has a series of built-in alarms related to NDL, PO2, safety stop, etc. Most of these alarms I actually like. I have not run into the PO2 alarms before because of only a few nitrox dives, but it gives a warning at 1.2 and another alarm at 1.4. I cannot turn this off in NORM, but I could swap to TECH and edit these myself. I am hesitant to do so just due to my lack of experience.
The goal of my post was to get a feel for whether keeping above PO2 of 1.2 made any sense or if that was being hyper-conservative. My general feeling is that its being hyper-conservative. For example, there is nothing uniquely dangerous about a 45-minute dive on 36% at 80 ft, especially if that is the first of only 2 dives that day, with the next dive being shallower. I think if I was doing 5 dives in a day, then maybe I would be more conservative. But I would certainly welcome other options.