Thanks again, guys! I've been reading your comments and the other posts and now it's clear to me I took part in an interesting operation, to put it mildly. I find it weird to have learnt a year after what I was doing that time and what I should have been taught. Well, better later than never.
stefo2, was no sausage, mirror or horn onboard. The only sausage I saw during the trip belonged to a German group, next to the Chrisoula K. You're right, I should have been checking my own air, too. It's one of the many lessons. And probably a wreck trip is not the best way to start learning, either. I didn't get certified. We were very much pressed for time which was probably a factor in all those mistakes that I've written about. At the end we ran out of time, so no certificate. I don't understand what signing in divers and out means. Is it like counting people, who's back and who's not? Or can you rephrase it?
Cave Diver, that's another lesson learnt.
300bar, yes, I went down on the tag line so I was hovering somewhere beside and a little above it. I saw some other wrecks (none from the inside and nothing deep, mainly from above), too, but as I wrote earlier, wrecks give me chills so I wasn't keen on this.
Afterdark, thanks, man
Third lesson learnt!
Brewski, thanks for the proper sequence. I guessed it would be something like that, but it's always nice to have a professional confirmation.
openmindOW, I understand now that it was improper and not according to standard procedure. But I wouldn't file that complaint at this time. Probably I should, but it's been more than a year etc. But I do appreciate your concern.