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Wow Mark, way to go mate... a great read and i feel for you as there's nothing worse than being rushed before a dive, any dive never mind a 50m training dive..
Mark, I wasn't there and so might get slated for saying this but based on what you've written I think your instructor failed you badly.. I think as a pressured and frustrated student you might be willing to put up with a few problem with the mndset of of "Oh bugger it, lets just do it" but your instructor should have a cool calm head and have a completely unbiased view... if the dive wasn't to be then it wasn't to be.
Firstly I'm suprised that after doing a bubble check at 6m and realising that your travel gas was leaking from a high pressure port that he did not abort the dive.. is this not the whole reason we do a 6m bubble check to find problems before its too late? too progess onto a 50m training dive armed with the knowledge that the HP port on the students travel gas could go at anytime was ludicrous.
I'm also suprised then that he allowed you to use your helium based back gas for your drysuit.. this could of chilled you very badly during a decompression dive with all of the inherent problems that would bring on.. used as a last resort to get you to the surface maybe, but to start a long deco dive with helium based insulation is madness.. another reason to have called the dive there and then...
I also find it hard to accept that an instructor would teach a student on O/C while he was on a rebreather with different deco obligations and dive profile, knowing that you would become separated during ascent, what on earth was he thinking?
Was he carrying some sort of bailout for you/himself incase there were problems down there?
Mark mate, I'm being serious not argumentative here, I'd be asking this geezer the same questions, now I realise that you might feel a certain loyalty to this guy but he did not do you the student any favours whatsoever.
BTW mate, get yerself an argon bottle, linking your drysuit to a stage just isn't cricket ;)
Glad to see you're ok but I'm hoping that this post raises a discussion cos I feel that your instructor was out of order.
Best regards
Dave.
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