Mr fish
Active Member
You can also read about it in books printer in the 1940 s
Double Fatality in June 2014 (UK) - Inquest and Media Reports
- Thread starter GLOC
- Start date
You can also read about it in books printer in the 1940 s
CAPTAIN NEMO
New Member
Both divers should have survived . Unfortunately diver "A" didn't validate his cells with a Dil Flush.
And diver "B" lost his onboard dil and turned the wrong gas off. Both have pressure gauges! .
If one of the other divers had assisted instead of watching/filming he may very well have survived.
I know this is a personal decision but sometimes all it takes is a helping hand to prevent a disaster
I am a firm believer that as your diving progresses , and the risks .So should your awareness and
rescue skills. Just my two pence worth.
And diver "B" lost his onboard dil and turned the wrong gas off. Both have pressure gauges! .
If one of the other divers had assisted instead of watching/filming he may very well have survived.
I know this is a personal decision but sometimes all it takes is a helping hand to prevent a disaster
I am a firm believer that as your diving progresses , and the risks .So should your awareness and
rescue skills. Just my two pence worth.
Mr fish
Active Member
No i think you will find I'm right with my dates . old hard divers using re breathers know all about co2 and oxygen tox long be4 ww2 so I'd stick with my dates
Best
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You are most probably right in respect of the hard hat divers. Simon quoted and displayed some scientific studies of CO2 and its relationship to OxTox from the 50's. Either way I understand a little better physiologically what happens to blood flow in the brain with higher CO2 and therefore the increased susceptibility to OxTox. Not something I will now forget in a hurry.
Regards
Larry
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Baron015
Member
Doesn't calibration also adjust for atmospheric pressure on the day and at the location of the dive ?
JJ training says to calibrate each dive day if not before each dive, or at least it did when I was trained.
Mike Ferguson
WTF is that?
I'm with Mark on this one, I rarely calibrate. if the cells all uniformly read .21 ish in air and 98% plus on a surface O2 flush, and I can spike them to @ 1.6 in the water when I want to, then I'm a happy bunny. without constantly calibrating I really notice if one starts to drift.
However if someone can come up with a good reason why I should calibrate every day I'm willing to listen.
However if someone can come up with a good reason why I should calibrate every day I'm willing to listen.
Mark Chase
ATB=AlwaysTalkingBollocks
My TDI MOD 1 training said i should swap out all three cells at once and if i got asuspected C02 hit i shoud take a sanity breath??????
That was bollocks as well
ATB
Mark
AP gave me the same advise with same reasoning when I had my cell issues. Never believed in this bullshit, they just sold crap for a while ...
tripntx
New Member
I replace my cells whenever they either reach 18 months from date of manufacture or 12 months after package was opened, whichever date happens first. Cells are fuel supplied, and have an extremely sharp drop off when they run out of fuel. The other part of my acceptable risk is to dive with BOV attached to offboard, use a dragger mouthpiece with strap, but I also have a SP S600 on offboard and practice by flipping BOV as a DSV and switching to S600 to stay current.
As far as calibration: I don't calibrate daily. I'll calibrate at the beginning of the week at a new location, otherwise I Validate them daily before each dive. I maintain a lot of online process analyzer in a Hydrocarbons cracker plant, and we seldom calibrate, but we Validate all the time. Plot charting would show if your cells are working properly and would show if they are drifting down or up. Going between slightly above the line and slightly below each time you check them is acceptable.
As far as calibration: I don't calibrate daily. I'll calibrate at the beginning of the week at a new location, otherwise I Validate them daily before each dive. I maintain a lot of online process analyzer in a Hydrocarbons cracker plant, and we seldom calibrate, but we Validate all the time. Plot charting would show if your cells are working properly and would show if they are drifting down or up. Going between slightly above the line and slightly below each time you check them is acceptable.
Baron015
Member
What do you do if you notice one has drifted slightly ?
Nothing ?
Calibrate ?
Be "extra careful" ?
Mark Chase
ATB=AlwaysTalkingBollocks
First thing I do is check the cell conections & biox them (and the cell its self) then ill swap the cell arround to see if the error folowed the cell. If It does i and the drop is significant (like .99 .99 .80) Ill probably bin the cell and fit a new one (especialy as its fit date is the oldest of the three)
If its within .1 having confirmed the cell contacts are good and done the wire wiggle test only then I'll recalibrate and ensure the cell is in the middle and as you say id be extra cautious on the dive. (more o2 spikes than normal possably another mid dive dill flush cell confirmation)
ATB
Mark
Mike Ferguson
WTF is that?
I run 4 cells with cell 1,2,3 on the controller and HUD and 2,3,4 on the backup handset . I'd check the cell contacts are clean and flash it up. if still off and the drifting cell is 1,2 or 3 I'd move the 'suspect cell' to cell 4, and put my cell 4 'spare in it's place (which I know is good because I've been looking at it for many dives) then recalibrate it and watch cell 4. if it still carried on drifting over subsequent dives I'd bin it as it's not stable.
Im of a similar mindset. I only calibrate when i need to.
Im sure the obvious doesnt need stating, but doing it this way you can see the cells starting to age. If you just calibrate every time, you wont know anything is going wrong until the cal fails, at which point its to late.... and you're probably fully kitted and raring to go
Truth be told, the main way i know a cell is close to failling is watching their response on a dive. you can see when one cell starts reacting more slowly.
Im sure the obvious doesnt need stating, but doing it this way you can see the cells starting to age. If you just calibrate every time, you wont know anything is going wrong until the cal fails, at which point its to late.... and you're probably fully kitted and raring to go
Truth be told, the main way i know a cell is close to failling is watching their response on a dive. you can see when one cell starts reacting more slowly.
matt
Well-Known Member
If you just calibrate every time, you wont know anything is going wrong until the cal fails, at which point its to late.... and you're probably fully kitted and raring to go
I don't agree. Is the assumption that everyone who calibrates each dive/day (i.e. as instructed for us Inspiration divers) simply don't take any additional steps/care in their cell verification procedure?
That's not what I do at least!
Matt.
Mike Ferguson
WTF is that?
no. that's not what was being discussed. what we were discussing was whether or not you need to calibrate your cells every time you switch the unit on and whether doing so masks any gradual reduction in cell performance making that degradation in cell performance harder to spot.
personally I run cells for between 12 and 18 months then bin them.
personally I run cells for between 12 and 18 months then bin them.
Baron015
Member
Not me.
