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I only use viton O rings for the first stage and SPG......... as its the only high pressure O2 part. Everything else is low O2 pressure and I use normal O rings.

Depending on your issue you could try the DDRC in plymouth, they offer remote phone consults for £20. A friend of mine had his signed off over webcam.

Ok question 1. Please show me from the BSAC site where it states approval to dive is needed from DO and the information required to be supplied. Question 2. If a welfare officer is in place, do they own the entire job and any governance, or is the DO suppose to be a welfare and child protection...

Hi Nick, possibly considering standing, however its such a vague job description its hard to know the correct way......... and of course just because the last DO did XYZ doesnt mean its correct.

Few questions regarding the role of diving officer..........There is no guidebook, no rules to follow or best practice, every DO does things their own way and its all open to interpretation How does a diving officer know their responsibilities, the job description is very vague and its to...

Good news

Just breath the loop till you get a fuzzy head after powering it down :p:p:p:p:p

my dive shop doesnt stock any mix, its all blended whilst you wait, usually slow too. If they had a bank of pre mixed gas i would probably use that to save time / faff

I don't have standard gasses.......... I have a set of rules based on the loop density, dil flush, END, mod rules - I have several Diluent in the shed and if i want to go diving i see what I've got vs what I need. I tend to get a heavy mix of around 15/50, then air top it after a days diving...

a valid point

does the prism have 2 mushroom valves? for them both to fail to the extend of co2 build up seems very unlikely.

Letting the scrubber dry out ? why? You know sorb needs moisture to work correctly ? Have a read of the simon mitchel paper on reusing sorb

I wouldnt see it as an issue, if it was me I would personally grab a competant CCR buddy and do a controlled drills and skills session to familiarise myself with the new lungs

Not through help via BSAC, they hung him to dry

Didnt help that BSAC chap in malta

Ive done sept and oct, both trips around 11-13 degrees, drysuit

Drop Mark Culwick a message, hes the Xccr guy in the area I think, maybe have a day refresher or something

The bsac find a club tool, if you click advanced, can select a club with CCR divers

What unit? I am on a AP, regularly dive with a bunch of lads at vobster if that's close enough for you Im guessing step 1 would be to go through the unit, cells, pos, neg etc etc and make sure your super happy diving the thing.

Sounds like a week in scapa is what you need :)