PART II
Additional information
• Diver 1 and Diver 2 have applied [appropriate] certificates, licenses and experience for diving to a depth of 45m.
• Diver 2 has dived only on PSCR for about 6 years.
• Diver 2 has performed several dozen dives to a similar or greater depth
• I estimate the number of dives that Diver 2 performed in his life at 350+
• The diver made the last 2 dives (mainly training ones) at the turn of February and March this year, mainly up to 20m.
• Diver 2 had good physical condition (regular general development exercises, bicycle) and mental (stable life, family and professional situation). No obesity, no smoking.
• Diver 2 did not have any chronic or congenital diseases (at least none of his relatives knew about it)
• Diver 2 had very high quality equipment, in perfect condition, regularly serviced and inspected.
• Diver 2 had a 2-year break in diving in his career, but for over a year and a half he regularly dived training and for pleasure only on PSCR both in Hańcza [lake] and in other waters in Poland.
Analysis
By. my assessment and in consultation with experts on the subject, Diver 2 being on optimal gas for max. depth for unknown reasons began to feel discomfort. It could have been carbon dioxide poisoning, increasing anxiety caused by poor underwater conditions (visibility and temperature), equipment inconvenience, relatively long break in diving to such depth - the last such dive was done about 5 months ago, unexpectedly worse mental health or / and physical on that day (e.g. pain, cramps, shortness of breath).
He reacted correctly to these symptoms by saying that something was wrong, but he did not show what was wrong and did not stop and finally switched from closed circuit to open circuit.
The gas in his back (most likely it was air) is not by. some standards optimal to such a depth, although admitted as possible [allowable], possible [permissible] and used for such dives. With the beginning problems (as I wrote above), the transition from trimix to open circuit with air as a breathing factor could additionally cause nitrogen narcosis, respiratory resistance and aggravate only the bad situation of Diver 2. This could cause total confusion and lack of control, getting lost, hyperventilation and possibly loss of consciousness. As a result, it [he] sank to the bottom, then the BOV automatic bypass could be pressed in the mouth and the back gas flow out. The second option is icing of the regulator as a result of hyperventilation and operation of the inflator and, as a consequence, to the free flow of gas. This can explain the empty cylinders on the back.
Certainly there should be no splitting up of the team underwater, divers were both responsible for it, but with the participation of the factors and actions described above, unfortunately, this happened.
The official cause of death was circulatory-respiratory failure, and consequently water in the lungs and drowning.
I don't have a profile from the Diver 2 computer at the moment.
Summary
During this dive I lost a very good friend, one of my diving partners, a great father and husband - just a decent man.
The deceased's family and friends from my surroundings behave wonderfully towards me and they are the support for me and not me [not vice-versa]. Although they honestly do not seem to blame me for this situation, I feel guilty that I could have done something better, faster, more accurately, or let something go, give up or not do anything at all.
Until now, I considered myself a pedantic person in diving (equipment, procedures, trainings, plans, logistics, conservatism), it seemed to me that I was managing the risk well, but all that was not enough.
Unfortunately, time will not go back. I will have to live with it.
Maybe it will make others think, how thin the border can be, how quickly it can be crossed and what little things they can decide.
Thank you to all the services, divers and civilians who helped before, during and after the rescue operation.
At the same time, I agree to the use of this material by anyone who wants it.
Please be advised that I will not reply to this post or forums on any posts, privy, SMS, facebook, etc. in this topic.
I attach a screenshot of my computer screen with this dive's profile.
If anyone has any substantive comments or questions, please contact me personally or by phone.
Diver 1 dive profile from his computer."
Sources:
forum.divtrek.com.pl http://jollydiver.com/opis-wypadku-na-hanczy-pscr/
Opis wypadku na Hańczy PSCR - Nurkowanie Jolly Diver