Live stream of Japanese deep submergence vehicle's 5,000 meter dive [video] | Hacker News Reader

Live stream of Japanese deep submergence vehicle's 5,000 meter dive [video]

live.nicovideo.jp

49 pointsdraugadrotten21 comments

This would be great marketing for a new monster movie. We're doing a world first, live stream as we dive to 5,000m, come watch! Hey, what was the weird thing that just passed by... oh my god, we're being attac... cut to stand by and watch as social media outlets explode with the news.

I can't help but see this like going to space... except more dangerous.

We don't have to worry about the rocket fuel.. but those guys are in that tiny little space with the sub holding back 500 atmospheres of pressure outside. Holding in less than 1 atmosphere in a space-ship is easy. Holding back 5 kilometers of water sitting on top of you is hard.

I thing you vastly underestimate the hard parts of going to space. Building something to withstand 500 ATM is actually fairly easy, safely dumping over 30,625 times the energy to get to 100MPH into something and then disipating it on the way back is a little harder.

"Fairly easy" seems a little dismissive; if it were even remotely easy, it would've been done earlier and more often, for all sorts of reasons.

Neither problem is at all trivial, and the one the rocket addresses (getting there) is not the same one the construction of a submersible does (staying there). I don't think the two endeavors are really comparable in any useful way; they're both pretty impressive in terms of logistics.

I wish there were English subtitles :( Why does there seem to be black plumes of smoke coming from the rocks/sea floor?

Possibly http://en.wikipedia.org/wiki/Hydrothermal_vent#Black_smokers...

Thank you, it certainly seems likely :)

Oh! They just reach the seafloor!

This is wonderful, they're broadcasting live from the bottom of the sea!

I remember a phrase, something like; We known more about the Outer Space then we do about Earth's Ocean.

Seems like they're using an optical cable to transmit the video feed back to the ship, then transmit back to the internet through satellite communication.

Congrats to around 110k people who are currently diving :D

Seems from the last few minutes like a Japanese studio discussion overlayed on top of a fixed poor-angle picture of three guys locked in a tiny space, with the occasional cut to a piece of machinery in the black doing nothing recognizable. Meh, pass.

They're currently still diving on their way to 5000m, which might still cost around an hour. I think the interesting part starts from there.

Do we know where approx. that dive location is?

It's around Cayman island, Caribbean sea.

How is the latency and quality? Any skips?

It's definitely quite high quality, just some lag due to satellite communication.

Wouldn't there be a physical tether?

Satellite seems like the last thing that would be used on a submarine, but I have almost zero knowledge of the actual tech used.

AFAIK, what they're currently doing is

submarine|-------optic fibre------>mothership------satellite-----internet

Oh, seems like the fiber cable has been cut off... by prawns maybe lol.

Yes, what a bummer. It was much more fun to watch while it was broadcasting video from the bottom. https://twitter.com/niconicoen/status/348479142871834624/pho...

Now it's back on the surface again.

http://en.wikipedia.org/wiki/DSV_Shinkai_6500

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