You were nicer than me.
2x al80s and 1x al40 at 500ft is waaaayyyy light on BO. Like <50% of what's needed.
The New Dive Rite Optima CM - My 30 Hour Review
- Thread starter Superlyte27
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2x al80s and 1x al40 at 500ft is waaaayyyy light on BO. Like <50% of what's needed.
No faster way to start a fight on a CCR thread than talking bailout. I recently watched a video of some guys doing insanely deep cave line pushing and their bailout seemed... less than optimal. But, I’m not diving to 220m plus so what do I know?
A 500’ dive is so far from anything I might ever do that I feel like I’m critiquing Neil Armstrong’s landing on the moon for being a “little bumpy”.
Armstrong was a hack. Computers did it all for him. Like becoming a national hero for riding the bus.
That's a joke
OP
Any rebreather might lose a cell for a few minutes during a dive. It happens when a drop of water hits the cell. It usually corrects itself pretty quickly. I've never called a dive because an optima wasn't able to dive.
OP
OP
You’re missing a pretty big qualifier in your math. What was your bottom time? My TTS was well under and hour when I started my ascent. I managed my PPO2 based on the ascent rate I wanted. On a 200’ dive you had what you had, but if your 200’ dive was less than a minute, how much bailout would you need. At any rate, I had WAY WAY more gas than I needed. But, I know a few things that you probably don’t.
OP
I wonder what your maintenance looks like. You shouldn’t be having cells drop out with proper maintenance and good cells. Granted, when I was using Maxtec cells, they were failing left and right. But I quit using those back in the rEvo days.
OP
So, to answer my own questions about how much bailout you need for a 4 hour dive at 100’ in open water, let’s do a bit of math off the cuff.
I’m going to guess at some of the numbers, but they’ll be close. You can verify them if you want. But at 4 hours at 100’ puts your deco at just under 90 minutes. Your first stop is at 50’ I think. It might be 60. But I’m pretty sure it’s 50. I’m going by memory. Granted, this is a dive on air at 1.2ppO2.
So, 90 minutes, with less than 15 of it being between 50’ and 20’ I’ll do this gas on 32% Bailout. At 20’ I’ll switch to Oxygen. So, 15 minutes on 32%. That’s an AL40. And 75 minutes on Oxygen, that’s also an AL40 of O2.
So, a 4 hour dive with a 1.2 set point with just two AL40’s for bailout/deco, in open water.
Anyway, this is pretty close based on a 4 hour dive we used to do a lot.
I’m going to guess at some of the numbers, but they’ll be close. You can verify them if you want. But at 4 hours at 100’ puts your deco at just under 90 minutes. Your first stop is at 50’ I think. It might be 60. But I’m pretty sure it’s 50. I’m going by memory. Granted, this is a dive on air at 1.2ppO2.
So, 90 minutes, with less than 15 of it being between 50’ and 20’ I’ll do this gas on 32% Bailout. At 20’ I’ll switch to Oxygen. So, 15 minutes on 32%. That’s an AL40. And 75 minutes on Oxygen, that’s also an AL40 of O2.
So, a 4 hour dive with a 1.2 set point with just two AL40’s for bailout/deco, in open water.
Anyway, this is pretty close based on a 4 hour dive we used to do a lot.
appreciate the response. I'll assume petrel as the controller, but ill stop asking for free game. Mainly looking for feedback on useability of the nerd controller before placing my order. Have an older nerd and love it, but havent had any experience using it as a controller.
OP
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