Greg Rosengarten
- Which version are you using (hint: look at the About screen)?
- Which OS are you running?
- (if applicable) which dive computer are you using?
Stuart Vernon
Hi Greg,
If you open the Filter window, you can filter by Dive Mode (the criterion at the very bottom), setting it to CCR to only show your CCR time.
If you then Select All, the Statistics tab will show you things like how many hours and dives you have just on CCR.
That said, what I do is put tags on each dive. For dives on my rEvo, I put a tag named *gasp* rEvo. 😃 For dives with OC doubles, I put a tag of Doubles.
This may not be useful to you, but if you ever dive a different CCR, the tags will let you keep straight on how many hours and dives you have on each different unit. You won’t be able to do that if you only rely on Dive Mode == “CCR”.
And, if you don’t start tagging your dives right away, it will be a huge PITA to come back later and tag them correctly. If you do it while you only have one type of CCR in your dive log, you can filter for Dive Mode == CCR, then Select All, then enter the tag once, to all the dives at the same time. Easy – if you do it now.
- Stuart
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Greg Rosengarten
Still hoping there will eventually be a way to calculate average pp02 without exporting the data first.
Stuart Vernon
I have never thought to myself “I wonder what my average ppO2 was on that dive.”
Why do you want it?
I do sometimes review the actual ppO2 lines in the profile to see how well it tracked with what I wanted it to be. Especially if I spent any significant time flying my unit manually. But, an average, with no standard deviation, wouldn’t really tell me anything in that regard. I mean, it could have a perfect average but still have varied wildly during the dive.
From: Subsurface Group <subsurfac...@googlegroups.com> on behalf of Greg Rosengarten <grosen...@gmail.com>
Reply-To: Subsurface Group <subsurfac...@googlegroups.com>
Date: Monday, May 11, 2020 at 10:42 AM
To: Subsurface Group <subsurfac...@googlegroups.com>
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Greg Rosengarten
Stuart Vernon
That’s what I was thinking that you might be thinking.
I think average is not really that useful for that. Example: You dive with a target ppO2 of 1.0. Half your dive you’re at 0.7 and half you’re at 1.3. Your average would be 1.0, but in reality, your ppO2 management was crap. 😊 That’s what I meant about needing Standard Deviation as well, if you’re going to look at the average.
If your target was 1.0 and your average was 1.0, AND you had a SD of 0.05, that would mean you did well. If your SD was 0.2, then you didn’t do very well. Regardless, you couldn’t tell from looking at the average ppO2.
Probably best to just stick with the visual review of the ppO2 lines.
Plus, when you see the ppO2 changing, you can correlate it to depth changes, so you can tell if you actually messed up, or if the ppO2 was changing “normally”.
From: Subsurface Group <subsurfac...@googlegroups.com> on behalf of Greg Rosengarten <grosen...@gmail.com>
Reply-To: Subsurface Group <subsurfac...@googlegroups.com>
Date: Monday, May 11, 2020 at 11:19 AM
To: Subsurface Group <subsurfac...@googlegroups.com>
Subject: Re: Generate statistics on a filtered set of dives by type (OC/CCR/Free/etc.)
I'm fairly new to ccr, and I'm diving an mccr, so I'm thinking average ppo2 would be a good way to assess how well I'd managed to hold the ppo2 within a target range. I also review the visual ppo2 lines, and I find them quite interesting on ccr. (In a way I never had before!)
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