Record Dive during Dynamic Dive Exhibition Lago Maggiore

caveseeker7

Awesome achievement, diving to that depth and returning in good health.
Congratulations to the team, and thanks to Mario and Fabio for the pictures and insight.

__________________
Cheers
Stefan



"Political Correctness is a doctrine, fostered by a delusional, illogical minority,
and rabidly promoted by an unscrupulous mainstream media,
which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"

DrJM

Thank you very much Fabio and all the team for sharing all the informations, it's really appreciated.


So if I understand well the "bad sensations" are before any gas switch; in the run time at roughly how long into the dive Sandro had those "bad sensations" ?

1) could that be related to a co2 hit with a break out into the sorb time ? then amplified with ICD due to OC Tx35/30

2) or ICD at 50m even on CCR even at cst ppo2
then amplified with ICD due to OC Tx35/30

3) or O2 hit at 50 due to high ppo2
then amplified with ICD due to OC Tx35/30

4) or god knows what ... Simon Mitchell help



Bonne journée

Jerome

__________________
www.snoopyloop.com
Deep Cave Exploration

DrJM

To avoid O2 pikes I'm flying down around SP1.2 with low O2 dil to keep ppo2 down when adv quick in

Going up switch nowadays to 1.4 ... at 1.5 ain't gainning much deco time off

then habitat at -12m for sure !!! I wish -21m

__________________
www.snoopyloop.com
Deep Cave Exploration

Mario

Hi guys,
I have learn this thecnique from Jerome during our dive in St Sauveur 2 years ago, and I love it for the same Jerome's reasons.
During the descent speed all works very well for me and in the first 90mt I was faster than 23mt/min then I slowed down waiting my buddies.
The descent was in head up position for all the 3 divers and I have used samll size sofnolime!

Sorry but the bell is property of "Palombarus Diving Works" and not mine

Ciao
Mario

__________________
Mario http://www.rebreatherworld.com/images/smilies/demon.gif

gtzavelas

congrats to all the team , not just for the dive but also for sharing the info...

fin

Congratulations gentlemen! Exactly the feel that I wish for expedition team spirit.
I vote for 2008 greatest Rebreather World thread (yet)

uwmadness

you are welcome




He had vertigo after around 1 hour and few minutes into the dive, according to Vplanner his CNS should be less than 50%

first Co2 hit symptoms, from what we generally know from experience, are shortness of breath but from literature you should have also "disorientation" , see here hypercapnia: Definition and Much More from Answers.com and here Permissive hypercapnia - Wikipedia, the free encyclopedia

Alessandro tought right to a problem in his scrubber and switching from a 6/80 diluent to a 35/30 bailout is a big increase in PPN2. I believe it had amplified the problem..may be it was a better option to use his bottom bailout (6/80 or 10/70)

I really don't know...if it was and ICD...I don't think so without a dil change...may be a vestibular hit the amplified by the switch

As I said, according to the planning, the CNS load at the moment of the OC bailout, was around 50% even if they were using quite high setpoint the bottom time was quite short and I don't think this is the case but we are not sure


May be we will never know the exact cause
Thanks to eveybody

Ciao
Fabio

__________________
DIR - Dive Inspiration Rebreather
www.uwmadness.it
www.allrebreather.eu

DrJM

Hey Fabio

thanks for the explanations.


Few questions on the habitat management if you don't mind:

- did you guys left boris outside the bell and if so on wich mode ? OC mode or Rebreather off via the 3 cells turn disabeld ? dil On in case ADV need to fire ? O2 solenoid shut off mecanicaly ? or O2 tanks off ? did the Boris make it ok dry to the surface ?

- inside the hab: narguile from surface or B50 outside the bell to feed inside divers ? air or low trimix break and how often 20 min or 30 min ?



Thanks for taking the time to answer

Jerome

__________________
www.snoopyloop.com
Deep Cave Exploration

Mario

Ciao Jer,

in the bell we had 50/20 staged out the habitat and the B40 of Oxy came from surface, air brack every 30minutes.

We left the Boris outside the bell, on my unit I closed the ox and dil shutoff valve but the unit is on CC, in this way, in case of problem Boris was ready to be used in "quick way"!

Opened my unit on surface, it was...very dry! Just an half coffee cup of water in the counterlungs.

I'd like to explore with you GdT...do you remember when 3 years ago you have sent to me the dive plan?!

Ciao
Mario

__________________
Mario http://www.rebreatherworld.com/images/smilies/demon.gif

Mario

Here for you a pictures from the fireman's ROV on the bottom:

Attached Images

sub-sul-relitto2.jpg (40.1 KB, 189 views)

__________________
Mario http://www.rebreatherworld.com/images/smilies/demon.gif