Diving into the Unknown Trailer

[vinegarbiscuit]

I know very little about rebreathers - only what I have picked up listening to my husband and his buddies - but it seems that the survivors really pushed their scrubbers hard. One of the surviving divers was in the water for about nine hours. I understand that some scrubbers (e.g., the scrubber in the Meg's "tall" canister) have a pretty long run life - I wonder If they had an opportunity to switch out the scrubbers and cans on their units (loosely speaking, one pound of sorb equals about an hour of run time, right?) for something with more longevity. Bearing in mind, too, these folks were also diving in pretty cold water, which could not have helped matters. I don't know what these guys were diving - a couple of JJs and a couple of Megs, I think? Even with a huge scrubber, it seems they were really pushing their equipment to the limit, and maybe even beyond. Taking also into account the exercise required to exit the cave, and the high CO2 build-up these guys must have experienced as they sought to overcome very stressful situations in the cave itself...the survivors were very lucky indeed.


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[floridabob]

Uh Huh.

[Nitrogenius]

I don't know what these guys were diving - a couple of JJs and a couple of Megs, I think?

The year before the accident I remember seeing some strapped down Inspo in some footage of the group as well..

[floridabob]

According to the link provided it sounded like they were planning to stay within reasonable limits on nearly any unit mentioned.

[vinegarbiscuit]

According to the link provided it sounded like they were planning to stay within reasonable limits on nearly any unit mentioned.

Quite, but one or two poor sods ended up staying far longer than originally planned. Perhaps a six pound scrubber would have been perfect for the original five hour dive plan, but I'm guessing that lot more firepower would have been needed for the 8.5 hour and 11.5 hour dives that actually did transpire (I think the biggest scrubber available for a Meg is "only" eight pounds). If the delayed divers pushed through the dive with six pound scrubbers, they were very lucky indeed. Maybe they used the biggest scrubbers possible from the outset in view of the cold water and the depths they were planning, I don't know - but even with bigger scrubbers, they would have been straining their units sorely with those actual run-times. Considering everything that went wrong on that dive, it seems there were a few things that went right for them, thank goodness.


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[Garth]

I think the cinematography is spectacular and look forward to seeing the actual movie once it comes out. I'll admit that most of why I look forward to seeing it is that there aren't many professionally made dive movies that keep true to the sport and the purpose. It is an interesting story and as long as they don't perform buddy breathing with full face mask rebreathers I'd say it an improvement.
This is a technically demanding dive for sure. No mention of heated suits or other thermal protection, did they have heated suits?


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[FW]

No mention of heated suits or other thermal protection, did they have heated suits?

They are from a cold climate, and probably used to cold water. There are other ways to stay warm, like more insulation. It would take one heck of a battery to keep a heated suit going for 8-11 hour dives. FWIW, rebreathers help some. It would be possible to hook up a heater on deco only.

[Nitrogenius]

... and as long as they don't perform buddy breathing with full face mask rebreathers I'd say it an improvement....

You mean after they had left their oxygen "Bailout" 40cft or 7ltrs (at quite some depth since they needed ddecompression habitats).. which were apparently too big to get through the passage that yet had been big enough to push a big ass rebreather through?..


yep that'll be an improvement

[DogDiver]

On the web site he voices enough battery for either the heated suit or light but not both.


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[FW]

I am posting this for someone in the UK.
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Hi all,

I have organised a one-off showing of this in London on Tuesday 27th September, 6:30pm at Picturehouse Central, and the director and producer are flying over for a Q&A after the film. Tickets are available here:

https://www.picturehouses.com/cinema...own-plus-qanda

I saw briefly that others had concerns about 'cashing in' on a tragedy so just to correct this point - the crew were filming the documentary before there was any accident at all. This isn't a recreation of events - these are the events as they happen. Following the tragedy, the film was cancelled, until the divers involved then approached the filmmakers to continue filming.

I decided to organise this showing because this really is a unique story; yes it's a tragedy, but it's also a story of courage, bravery and friendship. I'm organising it purely because I think stories like this need to get seen - I don't stand to gain from it in any way. Additionally, everyone I've spoken to who has seen it has been blown away by it.

Hope to see some of you there

Cheers

Mike