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## New Sub Dives To Crushing Depths245

University of Washington Scientists are reporting that they have a new autonomous underwater vehicle that increases both the attainable depth and duration of deployment over current submersibles. Weighing in at just under 140 pounds, the "Deepglider" is able to stay out to sea for up to a year and hit depths of almost 9,000 feet. "Deepglider opens up new research possibilities for oceanographers studying global climate change. The glider's first trip revealed unexpected warming of water near the ocean floor, and scientists are interested in studying whether the temperatures are related to global warming."
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## New Sub Dives To Crushing Depths

• #### Translation: (Score:5, Funny)

on Monday February 26, 2007 @03:14PM (#18156844)
For those who don't speak ancient google translated it to be:
9 000 feet = 2 743.2 meters

• #### Re:Translation: (Score:4, Funny)

on Monday February 26, 2007 @03:18PM (#18156922) Homepage Journal

Here in the US we don't use the Metric System, which is the tool of the devil! My car gets forty rods to the hogshead and that's the way I likes it.

• #### Re:Translation: (Score:4, Funny)

on Monday February 26, 2007 @04:19PM (#18157810)
That joke is older than 1,000,000,000 Sun orbits around the Earth.
• #### Re: (Score:3, Funny)

All right, so this may be the joke flying over my head, but since when did the Sun orbit the Earth?

• #### Re: (Score:2)

From our point of view, once per day.
• #### Re: (Score:3, Informative)

I know this is derived from a grandpa Simpson quote, but to put the quote in perspective, 40 rods is .125 miles and a hogshead is 63 gallons, so doing the conversion it's .00198 miles per gallon (.00084 km/liter according to google) or roughly a thousand gallons of gas to go 2 miles. That would cost me roughly \$30000 per day at current gas prices to get to and back from work.
• #### Re:Translation: (Score:4, Funny)

on Monday February 26, 2007 @07:36PM (#18160486) Homepage
The real question is, how many libraries of congress do you have to burn to get the same amount of energy? :)
• #### Re: (Score:2, Informative)

And to put that further into perspective, from a quick Google, the current record holder was the Japanese The Shinkai 6500 [jamstec.go.jp] With a maximum recorded depth of 6,527m.

It's still got a few K's to go.
• #### Re: (Score:2)

The point of the news/record is that this thing is both autonomous AND can last up to a year down there.

That's not the case of this manned submarine.
• #### Re:Translation: (Score:4, Funny)

<martin.espinoza@gmail.com> on Monday February 26, 2007 @03:58PM (#18157520) Homepage Journal

It's still got a few K's to go.

A few Ks hotter or colder?

K is kelvin. km is kilometers (or kilometres, even.)

• #### Re:Translation: (Score:4, Funny)

<forquerc+slash@gmail.com> on Monday February 26, 2007 @04:12PM (#18157714)
k can also be thousands, but in that case I believe it is standard to have it be lower case, and almost always is immediately preceded by a number (i.e. 401k).
• #### Re: (Score:2, Funny)

Were you going for (+1, Funny)? Cause you got a chuckle out of me.
• #### Re: (Score:3, Funny)

Actually, that 'k' is a subsection, thus 401(k).
Regards.
• #### Re: (Score:2)

K is kelvin.

Actually, K is Kelvins (capital letter). But thanks for not saying degrees Kelvin.

• #### Re: (Score:2)

Actually, K is Kelvins (capital letter). But thanks for not saying degrees Kelvin.

I always thought it was degrees Kelvins. Or was that Kelvin's degrees?
• #### Re: (Score:3, Informative)

I always thought it was degrees Kelvins.

Nope. Kelvins are treated as regular units, rather than degrees. So it's correct to read 10 K as "ten Kelvins", as opposed to the common equivalent, which would be -263 degrees Celsius (or -442 degrees Fahrenheit). Must have something to do with the fact that Kelvins are absolute, and therefore cannot be negative, although interestingly enough, it's correct to say 18 degrees Rankine, not 18 Rankines.

Kelvin himself was rather absolute in some of his pronounceme

• #### Re: (Score:2)

The Bathyscaphe Trieste made it to the bottom of the Challenger Deep, 10,916 metres (5969 fathoms) in 1960 with two people on board. In 1995, the unmanned Kaiko made it to a similar depth.
• #### Re: (Score:2)

For those who don't speak ancient google translated it to be: 9 000 feet = 2 743.2 meters
Conversions like that are why people are afraid of the metric system.

"almost 9,000 feet" = almost 3,000 meters.

• #### Re: (Score:3, Funny)

For those who don't speak ancient google translated it to be:
Google isn't really that ancient. It was only incorporated in 1998, I believe.
• #### Re:Translation: (Score:5, Funny)

on Monday February 26, 2007 @04:21PM (#18157850)
Funny, that's exactly how I read it the first time. My first thought was "What the hell? Ancient google?" Only after reading it twice did I realize he forgot a coma. I think we should fix those kind of problems before our Metric vs. US Units problem :)
• #### Re: (Score:2)

I think you meant to say that the poster forgot a comma. While it is entirely possible that the poster has forgotten someone, somewhere in a comatose state, it is not directly relevant to the grammatical snafu at hand.
• #### Re: (Score:2)

It's exactly that kind of thinking that makes interplanetary probes fail!
• #### Re:Translation: (Score:5, Funny)

on Monday February 26, 2007 @05:36PM (#18158946) Homepage

Only after reading it twice did I realize he forgot a coma.
Well, memory loss is a common attribute people have when they wake up from comas.
• #### Re: (Score:2, Funny)

It is? Thanks for the reminder.
• #### Re: (Score:2)

It's too bad google didn't teach you the concept of significant digits.
• #### Here's to you and here's to your soccer team (Score:2)

We have defeated the evil advocates of the metric system on every single front despite your best efforts. Your meters, your kilometers, your celsius - are all as popular and well known as is your strange game of soccer where men in shorts run around for hours never touching the polka dot ball with their hands. In America we don't learn no stinking metric system just like we don't learn no stinking foreign languages. So please take your amusing feelings of superiority and take your metric system bigotry and
• #### Re:Here's to you and here's to your soccer team (Score:4, Informative)

on Monday February 26, 2007 @07:54PM (#18160718)
I have a meter that measures kilometres. What's a kilometer, and what does it measure?
• #### Re: (Score:2)

Additionally, this is close to 2 miles depth!
• #### Funding guaranteed if ... (Score:2, Interesting)

you tie your pet project to Global Warming.

Doesn't matter how, just as long as you don't attempt to prove it wrong.
• #### Re:Funding guaranteed if ... (Score:5, Funny)

on Monday February 26, 2007 @03:21PM (#18156990)
I'd like to test the effects of global warming on the production and recreational use of the marijuana plant. I swear to God it will be a scientific study.
• #### Serious question (Score:3, Insightful)

on Monday February 26, 2007 @03:21PM (#18157002)
How would global warming, if it even exists as people say it does, affect the temperature of water on the ocean floor?
• #### Re: (Score:2, Insightful)

Well under the assumption that global warming has an effect on ocean streams this could be a possibility.

Obviously heat radiated from the core of the Earth is a much more likely cause...

• #### Re:Serious question (Score:5, Informative)

<[ ] ['' in gap]> on Monday February 26, 2007 @03:44PM (#18157336)
That is probably the very question they're trying to answer.

Ocean water is not stagnant and there are currents that mix surface water with warmer water in places where the surface water is colder (and denser) than the deeper water.
• #### Global Warming on the ocean floor? Ha (Score:2, Interesting)

I find it extremely unlikely that global warming is having any effect on the ocean floor. Head a mile off the coast of the pacific and swim down 20 feat. You'll notice a couple of things. One, it gets dark very quickly; meaning light doesn't get to travel far. Two, it gets very cold very fast; meaning the heat from the sun is not penetrating all that deeply.

To keep this on topic, cool submersible though. It would be incredible to really explore the very depths of the ocean just to see what kind of life we f
• #### Re: (Score:2)

Two, it gets very cold very fast; meaning the heat from the sun is not penetrating all that deeply.

And that water has a density maximum at about 4 degrees C. So (to a first approximation, ignoring issues like salinity gradients) 4 degree C water sinks below water at any higher or lower temperature, regulating the deep-ocean temperature - until you get down to where the ocean bottom is heating it faster than it can float away.

Heat input at the top just changes the level where it reaches 4 degrees, not what
• #### Re: (Score:2)

1. IIRC, you personally do not believe that Global warming is occurring, but I could be wrong.
2. notice the current transport? That runs accross the surface and then submerges carrying heat with it. Since I am not an oceanographer, I could not make an intelligent guess on it. But, I would guess that are not as well.
3. I suspect that a long term study will find that the ocean is fairly variable. The truth is, that we do not have that good of data related to temps and salinity, except at the surface. That is why a
• #### OMG - It MUST be global warming.. (Score:3, Insightful)

on Monday February 26, 2007 @03:31PM (#18157140)
So, the very first question is weather this is related to global warming or not. What about.. Or it may be due to hot magma underneath or some previously unknown "conveyor belt"?

Not jumping to conclusions or anything, are we??
• #### Re: (Score:3, Insightful)

So, the very first question is weather this is related to global warming or not. What about.. Or it may be due to hot magma underneath or some previously unknown "conveyor belt"?

Not jumping to conclusions or anything, are we??

No. We have a mat for that. The "Global Warming" square is right next to the "Violent Videogames" and "Acts of Terror" squares. You cant miss it.

• #### Speaking of jumping to conclusions (Score:2)

From TFA:
"The energy-efficient, battery-powered glider carries sensors to measure oceanic conditions including salinity and temperature -- information that is key to understanding climate change."

Which sounds reasonable to me. No causality claims were made. These are scientists, with anomalous data which they're quite naturally curious about. That's what they do. Why are you so quick to assume that wild claims are being made? If it's magma, or a new conveyor belt, fine. Knowing about it is a Good Thing, as
• #### Error in article? (Score:5, Informative)

on Monday February 26, 2007 @03:35PM (#18157212) Homepage
I'm working in a buoyancy related problem so I have to point this out. From the full article: "When pressure compresses a hull in a traditional glider, it gains buoyancy and requires more energy to control." If it's compressed, the volume shrinks, it gains density and loses buoyancy.
• #### Re: (Score:2, Interesting)

Yes, the article appears to be unclear on this. What they mean is that in a traditional glider, the compressibility will be either larger or smaller than that of seawater. In either of these cases, maintaining a steady rate of descent requires more ballast pumping to readjust the buoyancy. These gliders have isopycnal hulls, which have very close to the same compressibility of seawater, and thus require very little ballast pumping in order to maintain a constant glideslope.
• #### Re: (Score:2)

I see. That would be too much to write in a wired article for the general public.
Your explanation makes it clear that the seawater compressibility shouldn't be neglected.

Since it's supposed to use little power, I wonder if this would be useful as a means of transporting goods. Would be slow though.
• #### not a submarine (Score:5, Informative)

<info AT devinmoore DOT com> on Monday February 26, 2007 @03:51PM (#18157432) Homepage Journal
The reason this matters, from TFA, is that this is a glider, not a submarine. It's cheaper, lighter, and more energy efficient than dropping a big ball to the bottom of the ocean. This thing can drive around and look at stuff very similarly to how a non-crush depth submersible could do.
• #### MOD Parent +5 (Score:2)

Did anyone even read the article(submitter included). This isn't a sub at all. It is the equivilant of a buoyancy controlled rock with sensors. It is cool stuff though, but these guys aren't gonna be using this thing to look at ship wrecks or follow sperm whales or anything.
• #### Re: (Score:2)

Not quite. Unlike a rock, this thing can move around. With those wings, they can convert depth changes into forward motion. It seems buoyancy control uses less energy than a propeller, so they've got a very efficient propulsion system. The tradeoff is a low top speed.
• #### The Religion of Global Warming Strikes Again (Score:2, Informative)

How sad is it when a scientist sees something for the first time and rather than say 'I have no clue whay this is happening, I should study the reason this is happening' says 'This might be because of gloabal working, I should go look for a link'.
• #### Re: (Score:2)

How sad is it when a non-scientist is presented with evidence of a phenomenon for the millionth time and rather than saying "maybe these scientists are on to something after all" says "this must be religion striking yet again"?

• #### Progress? (Score:4, Insightful)

on Monday February 26, 2007 @03:59PM (#18157536) Homepage
It always amazes me, that we (well, humankind that is, I can't take all the credit) managed to dive to almost 40,000 feet with the Challenger [wikipedia.org] in *1951*, but haven't been back or deeper since! There is so much to explore on our own planet, and so much effort is being placed into going out into a vast, mostly empty vacuum, instead of looking under our own massive oceans, which are teeming with life (almost a new form, ever time we look at it).

The discoveries we are likely to make under our oceans, are undoubtedly going to be of far more relevance and benefit to our own lives on this little planet, that anything we find "out there." Yes, I think we should do both, but I think the depths of our oceans are severely and disproportionately neglected, except for the odd diving renegade.
• #### Re:Progress? (Score:4, Informative)

on Monday February 26, 2007 @04:20PM (#18157830) Homepage
the challenger was a sailboat carrying instruments. It didn't dive. The bastiscaphe trieste, did though. You probably were thinking about this one. http://en.wikipedia.org/wiki/Bathyscaphe_Trieste [wikipedia.org]
• #### Re: (Score:2)

Believe it or not, going to space is almost easier than going that deep.

IIRC, they had no windows and just touched the bottom before releasing ballast and returning to the surface.
• #### Global Warming? (Score:2, Insightful)

Why do they think they have to toss in a comment on Global Warming?

Then...

Consider that the oceanic currents have cycle times measured in 1000's of years. Depending on where they are diving, if they are finding unexpected warming then this would mean that mankind would not be responsible for any presumed planetary warming... since the temperature of the water they are measuring was determined centuries ago.

However, closer examination of such a silly statment leaves one with a question... If they had to sen
• #### 9000 feet is less than the average ROV: wiki (Score:2)

This sub seems not to reach the depth the average ROV reaches

From http://en.wikipedia.org/wiki/ROV [wikipedia.org] ...More than half of the earth's ocean is deeper than 3000 meters, which is the current working depth of most of the ROV technology...

For those who don't know the fathoms, feet and furlongs, 9000 feet is 2743 meter.

• #### My MiniSub (grad proj) could outpeform Deepglider (Score:2)

I am building a robotic min submarine for my masters thesis in computer science. I have learned a lot about fluid dynamics and systems control is hostile environments. The remote monitoring and control systems have been developed in G using National Instruments' LabVIEW while the mini sub itself is currently utilizing multiple 8 bit Microchip microcontrollers. Though even as I write this the design process has started for a prefab PCB board that will see these chips replaced by 32 bit Freescale (Motorola)
• #### Thank God for Al Gore! (Score:2)

I was cooking on the grill today, and I started to feel warmer and warmer. It started getting so hot the meat cooked to a nice brown. Gobal warming ( thermaldynamics ) must be stopped! If only we could get another pop star to sing about the volcanic vents of the ocean caused by man!
• #### Ahem. (Score:3, Funny)

on Monday February 26, 2007 @06:01PM (#18159284)
All subs can dive to crushing depths. The problem is getting back up.
• #### Re:Ahem. Mod parent up Funny! (Score:2)

Damn that is a funny comment!
• #### Unexpected | Unforeseen = Global Warming ? (Score:2)

From the article: The glider's first trip revealed unexpected warming of water near the ocean floor, and scientists are interested in studying whether the temperatures are related to global warming.

"The maiden voyage was wonderful," says Charlie Eriksen, professor of physical oceanography at the University of Washington in Seattle. "On every dive we got within 10 meters of the bottom and we were able to see some interesting bottom temperature and salinity variations that we didn't know about, that I certain

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