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Expedition Pacific Abyss on discovery now...



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Old 15th October 2007, 20:31   #11 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Quote: (Originally Posted by ScubaDadMiami) View Original Post
What I want to know is: how can I learn to rebuild a flooded handset for use in diving the next day while in a remote location?
Here's what you need:

1) A good source of fresh water.

(Note: I seriously considered using the other source of fresh water shown in the photo...and pulling the lever...until I discovered it could be salvaged).

2) A toothbrush that you never, EVER, plan to use on your teeth afterwards.

3) A MacGyver-esque method to thoroughly dry the electronics (in this case, an air conditioner).



4) A good workspace, the right tools, and a dive partner who is handy with a soldering iron and clever about ear-mounting an LED light. Oh, and an endless supply of caffine.


5) One all-nighter (scratch that....it was actually two all-nighters).

Oh, and it doesn't hurt to have a spare rebreather on board as well...

Quote: (Originally Posted by hnladue) View Original Post
The guy whose rebreather failed? His O2 was reading high right. No bailout? Why no dil flush? He was at ~130ft. Wouldn't a dil flush has let him know how and if his computer was even working? Even when at 90 ft and the thing quit.... he didn't bail to OC.....I know that it should have still been working ok, and kept him at the last settings it knew right? He could hear the o2 sensors clicking, so he knew it was still functinoing?? Was he not following any rules?? BADDAS??? He just totaly blew everything my instructor has been teaching me out the window.

Were they diving air up to 300ft??? Then I see they switch to trimix for the 'deeper' dives.... eh? Shouldn't they have been diving trimix on anything deeper then 200 or so? Anyone else catch that?

I'm a newbie when it comes to these, but at least safety has been drilled into my head. But that guy just cornfused me!!
Fair questions, all. Simple answer: don't believe everything you see on TV.

There were a number of "cringe-worthy" moments as we watched it ourselves last night. One of them was the insinuation that we used "air" for any of the deep dives, and only switched to helium later. This is, of course, utter nonsense. At one point they said we had to decompress because of "nitrogen", and then they made it seem like we only started using helium in Yap (I assume they did this as a lead-in to explain the silly voices -- which, incidentally, were real). We use helium on all dives deeper than about 40m (I would strongly advise against using air as diluent down to 200 feet, as you suggest).

As for John's "catastrophic rebreather failure", as it came to be known, umm...well, let's just say that Fox News isn't necessarily "Fair and Balanced", "Reality" shows oftentimes aren't, Professional Wrestling isn't real, and....errr...Discovery Channel can sometimes hype the drama a bit (Noooo....really?? )

Here's the real story: There was only one moment of actual concern for John's well-being, which was when he first glanced at the PO2 readings on his LCD and they were 3+ atm. Thankfully, the moment of concern passed very quickly when it became immediately obvious from the triple-redundant secondary display (as well as the HUD, and a diluent purge of the sensors) that the LCD readings were whacked, and the sensors and the rest of the electronics were fine. A few more tests later and we determined that PO2 control was still functioning correctly, as were the three secondary display readings (I actually think of them as the "primary" display -- but that's a philosophical discussion for another day). Basically, we decided to continue the dive at the wreck, just below the up-line, with John monitoring the situation (and hence at lower risk than on normal dives, due to the slaying of the complacency monster -- see "Richard's Reliable Rebreather Paradox"). One of the nice things about the Cis-Lunar MK5 is that it can have several major system failures and still give you more ways to monitor and control your PO2 than most rebreathers do when they're fully functional. I often (half-) joke to my non-Cis-Lunar rebreather diving friends that I'd rather have a half-functional MK5 on my back, than a fully-functional [insert friend's rebreather model here] rebreather on my back -- but let's not go there...

Anyway, as soon as John lost his HUD, it was obvious that the problem was more systemic, and we immediately called the dive (even though he still had ample means of monitoring and controlling the loop PO2, not to mention full OC bailout capability and little more than a safety stop in terms of decompression obligation).

So...don't freak out too much. You should definitely listen to your instructor -- it's clear that you were taught well. But also keep in mind that not everything on TV is an accurate reflection of reality. You might also want to keep in mind that John Earle has been diving since the 1950's, has been diving with rebreathers since 1994, happens to be the smartest person I know, and has never once been bent (the only person I know with his level of deep-diving experience who can make that unqualified claim unambiguously). Oh, and he's about as opposite from the chest-thumping, knuckle-dragging "BADASS" deep-diver type as it gets (not many such divers compose poetry to pass the time on decompression). I only wish my own mental algorithm for staying safe underwater was as consistently reliable as his.

One other point: John has had chronic problems with the LCD electronics on his rebreather, and is no stranger to flying it manually. In fact, it was while diving with John many years ago that I first formulated the notion of "Richard's Reliable Rebreather Paradox" (related to "complacency kills") -- in that, during our early days of rebreather diving, while his rebreather was more fickle than mine, I was the one who kept having near-misses.

By the way...what was on Discovery last night was the "Americanized" (and annoyingly commercial-rich) version of "Pacific Abyss". The full 3-hour version (sans commercials) will be broadcast in the UK on BBC sometime in the next few months. I'm expecting to cringe a bit less when I watch that version.

Aloha,
Rich
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Old 15th October 2007, 22:26   #12 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Thanks for giving us "the rest of the story." Have some green.

Will you be at DEMA and the Rebreather World Party?
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Old 15th October 2007, 23:41   #13 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Awesome, thanks for the info Rich.

For us poor antipodeans, any clues as to if / when it'll be available on DVD? We're a bit backward down here when it comes to availability of decent shows on TV... a whole 5 channels to watch...
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Old 16th October 2007, 00:12   #14 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Very interesting show...I think I want a Newtsuit...I heard they come with thier own 'breather.

Anyone up for a "part ownership"?

The presentation is on again Oct 21 @ 12PM
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Old 16th October 2007, 02:03   #15 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Rich,

Thank you. I hope we get to see the fill 3hr event sometime. I really enjoyed what we did see!

I did notice the squeaky voices before you went to yap and I thought trimix!! But then they mentioned switching to trimix after.... huh? so now I get it. BTW I wouldn't use air to 200 either. Just using 200 as a example. Personally I would switch to trimix at 130, but I'm not certified for trimix yet! I've never heard of the rebreathers your diving. I've only been learning on the inspiration with the vision electronics.

I like your new sport.... competitive Fish Catching..... is that a full contact sport?

Thanks again!
Heather.

Quote: (Originally Posted by deepreef) View Original Post
Fair questions, all. Simple answer: don't believe everything you see on TV.

There were a number of "cringe-worthy" moments as we watched it ourselves last night. One of them was the insinuation that we used "air" for any of the deep dives, and only switched to helium later. This is, of course, utter nonsense. At one point they said we had to decompress because of "nitrogen", and then they made it seem like we only started using helium in Yap (I assume they did this as a lead-in to explain the silly voices -- which, incidentally, were real). We use helium on all dives deeper than about 40m (I would strongly advise against using air as diluent down to 200 feet, as you suggest).

As for John's "catastrophic rebreather failure", as it came to be known, umm...well, let's just say that Fox News isn't necessarily "Fair and Balanced", "Reality" shows oftentimes aren't, Professional Wrestling isn't real, and....errr...Discovery Channel can sometimes hype the drama a bit (Noooo....really?? )

Here's the real story: There was only one moment of actual concern for John's well-being, which was when he first glanced at the PO2 readings on his LCD and they were 3+ atm. Thankfully, the moment of concern passed very quickly when it became immediately obvious from the triple-redundant secondary display (as well as the HUD, and a diluent purge of the sensors) that the LCD readings were whacked, and the sensors and the rest of the electronics were fine. A few more tests later and we determined that PO2 control was still functioning correctly, as were the three secondary display readings (I actually think of them as the "primary" display -- but that's a philosophical discussion for another day). Basically, we decided to continue the dive at the wreck, just below the up-line, with John monitoring the situation (and hence at lower risk than on normal dives, due to the slaying of the complacency monster -- see "Richard's Reliable Rebreather Paradox"). One of the nice things about the Cis-Lunar MK5 is that it can have several major system failures and still give you more ways to monitor and control your PO2 than most rebreathers do when they're fully functional. I often (half-) joke to my non-Cis-Lunar rebreather diving friends that I'd rather have a half-functional MK5 on my back, than a fully-functional [insert friend's rebreather model here] rebreather on my back -- but let's not go there...

Anyway, as soon as John lost his HUD, it was obvious that the problem was more systemic, and we immediately called the dive (even though he still had ample means of monitoring and controlling the loop PO2, not to mention full OC bailout capability and little more than a safety stop in terms of decompression obligation).

So...don't freak out too much. You should definitely listen to your instructor -- it's clear that you were taught well. But also keep in mind that not everything on TV is an accurate reflection of reality. You might also want to keep in mind that John Earle has been diving since the 1950's, has been diving with rebreathers since 1994, happens to be the smartest person I know, and has never once been bent (the only person I know with his level of deep-diving experience who can make that unqualified claim unambiguously). Oh, and he's about as opposite from the chest-thumping, knuckle-dragging "BADASS" deep-diver type as it gets (not many such divers compose poetry to pass the time on decompression). I only wish my own mental algorithm for staying safe underwater was as consistently reliable as his.

One other point: John has had chronic problems with the LCD electronics on his rebreather, and is no stranger to flying it manually. In fact, it was while diving with John many years ago that I first formulated the notion of "Richard's Reliable Rebreather Paradox" (related to "complacency kills") -- in that, during our early days of rebreather diving, while his rebreather was more fickle than mine, I was the one who kept having near-misses.

By the way...what was on Discovery last night was the "Americanized" (and annoyingly commercial-rich) version of "Pacific Abyss". The full 3-hour version (sans commercials) will be broadcast in the UK on BBC sometime in the next few months. I'm expecting to cringe a bit less when I watch that version.

Aloha,
Rich
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Old 16th October 2007, 10:04   #16 (permalink)
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"Richard's Reliable Rebreather Paradox"

For those unfamiliar with "Richard's Reliable Rebreather Paradox", it states that highly reliable rebreathers can be more dangerous than unreliable ones, because reliability fosters complacency.
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Old 16th October 2007, 20:12   #17 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Quote: (Originally Posted by jdicediver) View Original Post
...I think I want a Newtsuit...I heard they come with thier own 'breather...
the suit is a rebreather which operates at 1 atm... BTW, it only uses one cell to monitor O2. I had the oppertunity to look one over, as well as all the support gear and other apparati recently...

I was hoping they would take the suit deeper than the sheep-ish 400-ish fsw...

I would love to see the non-americanized 3hr version too!

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Old 16th October 2007, 21:41   #18 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Quote: (Originally Posted by hoppyinca) View Original Post
the suit is a rebreather which operates at 1 atm... BTW, it only uses one cell to monitor O2. I had the oppertunity to look one over, as well as all the support gear and other apparati recently...

I was hoping they would take the suit deeper than the sheep-ish 400-ish fsw...

I would love to see the non-americanized 3hr version too!

hoppy
I understand that some woman by the name of Earle has the record for a solo dive taken using a Newtsuit to a record depth of 1250fsw.

Home Page for Sylvia Earle

WOW...what an amazing Lady!
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Old 16th October 2007, 22:34   #19 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Quote: (Originally Posted by jdicediver) View Original Post
I understand that some woman by the name of Earle has the record for a solo dive taken using a Newtsuit to a record depth of 1250fsw.

Home Page for Sylvia Earle

WOW...what an amazing Lady!
I don't think so. The US Navy is working with a similar device that is going to 2,000 fsw. It may be that military stuff doesn't count in the recordbooks.
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Old 22nd October 2007, 03:04   #20 (permalink)
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Re: Expedition Pacific Abyss on discovery now...

Hello Rich, thanks for posting. I really enjoyed the show, despite the dumb down. Always nice to see more fish watchers diving CCR, not as many of us as the wreck buddies.

I'm interested to know more about your planning for the deep dives. Looking at your gas supply, it seems that you didn't bring enough for full open circuit bailout, maybe only SCR, right? Do you mind sharing some of your thinking about bail out strategy with us? Thanks, -Andy
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