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Mine Exploration Forum

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Author Tankless diving? Apparently so...
Blober

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Tankless diving? Apparently so...
Posted: 28/06/2017 12:34:57
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https://www.indiegogo.com/projects/airbuddy-tankless-diving--3#/

Interesting idea, i'm sure the divers on here will be screaming out about safety and potential impact of inexperience, but I wonder about the practical use of using something like this underground to dive into small sections or the like?

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robnorthwales

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Tankless diving? Apparently so...
Posted: 28/06/2017 12:47:53
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Hmm. No backup air supply. Surface supplied, so risk of entanglement of the air line. Risk of the air line catching on a nice sharp rock and getting severed. Battery operated, can run out of charge at any moment.

It's designed (deliberately) to be used in open and shallow areas where you'd have a clear path directly to surface - so that if the supply was interrupted, you could head straight to the surface without any pauses, just breathing out to reduce pressure.

My biggest issue with something like that would be complete novices using it, and not having a clue as to what to do in the event of an equipment failure. Whilst it's all well and good a basic instruction handbook telling them what to do, it's the training that gives you the real skills and awareness.
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sinker

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Tankless diving? Apparently so...
Posted: 28/06/2017 13:13:38
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Scares the life out of me!

Some years ago we used to enter gas filled confined spaces, to isolate leaks etc, using a compressor-fed positive-pressure mask and hood.

True Story.
Big gas main burst in Chester one day so we go out to sort it out. Traffic lights up, police have the road closed and the area sealed off, major incident. Foreman puts the air-fed mask on and enters an underground valve chamber to look for the burst. Supervisor turns up and parks his car by the valve chamber. 30 seconds later the Foreman flies up out of the chamber, gasping for breath, rips the mask off, face as red as a beetroot. Has a quick look around and then jumps on the Supervisor and starts throttling him. A few guys pull him off asking what the hell is wrong....

"That stupid ***** has parked his car with the wheel on the the air hose!"

Laugh Laugh Laugh Laugh

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Ah, well, now, you see.... IP: 88.97.24.95
Wormster

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Tankless diving? Apparently so...
Posted: 28/06/2017 17:06:41
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Looks like it has potential for many, many Darwin nominations/awards!!!

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RAMPAGE

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Tankless diving? Apparently so...
Posted: 28/06/2017 17:46:11
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I think it has potential for the right application by the right people.

Nothing to stop a user having one of those tiny pony tanks with them like "Spare Air" or equivalent. That would easily get you back to surface from -12m.

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legendrider

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Tankless diving? Apparently so...
Posted: 28/06/2017 18:05:13
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The first non-free divers were fed via an air line from a 'compressor' on the surface; this would typically be hand-operated by 2 guys turning a crank-wheel.

In the event of a hose or seal popping, or failure to maintain adequate working pressure, the unfortunate diver could literally be squeezed back up the hose, leaving a rather messy bag of bones down below. Crying

Other than that it worked just fine. Roll Eyes

MARK



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festina lente IP: 86.174.189.104 Edited: 29/06/2017 08:27:50 by legendrider
Roger the Cat

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Tankless diving? Apparently so...
Posted: 28/06/2017 18:07:42
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The video seems to infer that diving alone might be a good idea for your average wonk addicted to new gadgets. Definitely Darwinism in operation. A thankless job....... IP: 81.170.16.223
SimonRL

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Tankless diving? Apparently so...
Posted: 28/06/2017 20:08:55
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legendrider wrote:

Other than that it worked just fine


Depends on how you interpret fine!

Between 1886 and 1910 there were 10,000 deaths and 20,000 cases of paralysis amongst sponge divers in the Aegean, most of them from a small island called Kalymnos.

OK, this was lack of knowledge of the necessity of safe decompression rather than the kit itself, but lack of knowledge rather than the kit is usually what gets people...

There is a book on it - Bitter Sea by Faith Warn - for anybody interested.


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RAMPAGE

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Tankless diving? Apparently so...
Posted: 28/06/2017 22:04:37
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Where's your sense of adventure?

I'd be game to try it Big Grin

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SimonRL

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Tankless diving? Apparently so...
Posted: 28/06/2017 22:07:37
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Oh I'd try it in open calm water Smile

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BertyBasset

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Tankless diving? Apparently so...
Posted: 28/06/2017 22:24:44
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Bends wise. With a 12m hose + 45 minute dive time. Looking at some rough tables, if you're at 12m for that time, you need a 3m stop at 5m. If you run out of juice before getting your 3m in, then it's straight up.

Might be on the milder side of the bends spectrum, but imagine if you've bought the extra battery and wired them in parallel for a 90 minute dive.

Helicopter flight to Ellesmsere Port flying under the Menai Bridges - which according to urban myth is what happens if you get decompression sickness in Dorothea.
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robnorthwales

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Tankless diving? Apparently so...
Posted: 28/06/2017 23:41:53
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BertyBasset wrote:



Helicopter flight to Ellesmsere Port flying under the Menai Bridges - which according to urban myth is what happens if you get decompression sickness in Dorothea.


Urban myth no more. I know someone it happened to.

A climb in altitude of even 100 feet on the helo can result in greatly increased nitrogen bubble sizes - the existing bubble grows, and it also attracts more nitrogen out of the super-saturated bloodstream, thus growing it even faster. A small bubble can rapidly become huge levels of brain damage.
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BertyBasset

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Tankless diving? Apparently so...
Posted: 29/06/2017 00:27:43
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I'm pleased to have that confirmed as fact. I always hoped it was true. IP: 86.163.5.136
legendrider

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Tankless diving? Apparently so...
Posted: 29/06/2017 08:29:22
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SimonRL wrote:

legendrider wrote:

Other than that it worked just fine


Depends on how you interpret fine!



Original post edited to reflect intended irony Wink

MARK

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festina lente IP: 86.174.189.104
sinker

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Tankless diving? Apparently so...
Posted: 29/06/2017 08:51:52
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legendrider wrote:



.....the unfortunate diver could literally be squeezed back up the hose, leaving a rather messy bag of bones down below. Crying



Laugh Laugh Laugh Laugh

And a hell of a mess to clean out of the pump too Shocked

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Willy Eckerslyke

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Tankless diving? Apparently so...
Posted: 29/06/2017 08:55:04
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BertyBasset wrote:

I'm pleased to have that confirmed as fact. I always hoped it was true.

I saw it happening quite a few years ago. Having an office overlooking the bridge, I tend to notice helicopter activity along the Strait. Sadly, most of the time they're searching after an incident.
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SimonRL

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Tankless diving? Apparently so...
Posted: 29/06/2017 10:03:58
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Totally off topic, although as Darwinism has been mentioned...

http://www.bbc.co.uk/news/world-us-canada-40438207

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robnorthwales

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Tankless diving? Apparently so...
Posted: 29/06/2017 10:22:25
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Regarding SCUBA. Somewhat disconcertingly, after a long dive, or a set of dives, you can actually hear your bloodstream 'fizzing' while it off-gasses, if you've got a stethoscope.

And that's if you're staying well within safety margins !
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RAMPAGE

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Tankless diving? Apparently so...
Posted: 29/06/2017 14:42:38
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SimonRL wrote:

Totally off topic, although as Darwinism has been mentioned...

http://www.bbc.co.uk/news/world-us-canada-40438207


A thick book isn't going to stop a .50 round at 30cm range. Even if he had slipped a half inch thick sheet plate of Hardox steel into the book, it would have in the least shattered his ribs.

If you're that stupid you shouldn't be playing with large calibre handguns. or indeed anything more dangerous than a hairdryer. What an absolute pair of idiots, and left two kids with a dead father and a mum in jail. Result... Confused



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IP: 176.35.105.31 Edited: 29/06/2017 14:43:42 by RAMPAGE
Digit

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Tankless diving? Apparently so...
Posted: 29/06/2017 15:35:04
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RAMPAGE wrote:

SimonRL wrote:

Totally off topic, although as Darwinism has been mentioned...

http://www.bbc.co.uk/news/world-us-canada-40438207


A thick book isn't going to stop a .50 round at 30cm range. Even if he had slipped a half inch thick sheet plate of Hardox steel into the book, it would have in the least shattered his ribs.

If you're that stupid you shouldn't be playing with large calibre handguns. or indeed anything more dangerous than a hairdryer. What an absolute pair of idiots, and left two kids with a dead father and a mum in jail. Result... Confused



If you're that stupid you probably would use a hairdryer in either the bath or shower. Confused

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