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how did John Cameron "tweet" from the bottom of the Marianas Trench?

A

Archimedes' Lever

Jan 1, 1970
0
Did they send up a buoy that sent the data once it surfaced?

Did they use VLF?

The news said he "tweeted" from down there.

I say, if that is so, how did he do it?
 
A

Archimedes' Lever

Jan 1, 1970
0
Breathing helium?

Cheers

Phil Hobbs


The mix down there may or may not be a Helium mix. ISTR that it is
not, once a certain depth is passed.

I do know he has a long wait in a HBC before he can emerge topside
again.
 
A

Archimedes' Lever

Jan 1, 1970
0
Here's something approaching an answer, from
http://deepseachallenge.com/the-sub/systems-technology :

"The DEEPSEA CHALLENGER‘s pilot will be alone, but he’ll spend a lot of
the journey talking: He’ll narrate a “dive log” to two small cameras
(two are needed to create 3-D video) inside the sphere. He’ll also talk
to the surface through several systems—one with a 19-mile (30-kilometer)
range underwater. When necessary, he’ll be able to send text messages,
which are more efficient than voice communications. The submersible’s
mother ship, the Mermaid Sapphire, and the 30-foot (9-meter)
rigid-hulled inflatable Prime RHIB are each equipped with two
transducers—one on board and another suspended on a cable about 330 feet
(100 meters) below the water. The sub also has a backup acoustic
modem/transponder powered separately from the sub’s main battery. Once
the sub surfaces, it will also use a VHF marine radio to communicate
with the crew."

So apparently he has something resembling a very slow modem down there,
and the ship likely has an Internet connection via satellite or whatever.

I think you were right the first time, and regardless of their on-board
comms, he sent the tweet by proxy from the surface.

Would a fiber optic tether really be so heavy?
 
M

mike

Jan 1, 1970
0
The mix down there may or may not be a Helium mix. ISTR that it is
not, once a certain depth is passed.

I do know he has a long wait in a HBC before he can emerge topside
again.

Why would that be???
 
M

mike

Jan 1, 1970
0
So he can decompress slowly (purge the blood of Nitrogen)?

Why decompress????

From the dashboard pix at the linked page, the internal pressure is ~1bar.

With 1100bar external pressure, any internal pressure tolerable to a human
would be inconsequential from a structural point of view.

yes? no?
 
A

Archimedes' Lever

Jan 1, 1970
0
Thanks for the link. Nice details of the redundancy of the weight drop
system.

Though "timed galvanic decay" sounds like a scary thing to rely on.
 
A

Archimedes' Lever

Jan 1, 1970
0
Good to know that you're sure...

I think dumbfucks like you, who enter a thread simply to make retarded
comments like this, should be shot and dumped into a lye pit.

It is not good to know that there are idiots like you running around.

**** you, you retarded little bitch.
 
A

amdx

Jan 1, 1970
0
Did they send up a buoy that sent the data once it surfaced?

Did they use VLF?

The news said he "tweeted" from down there.

I say, if that is so, how did he do it?

To Quote;

"When necessary, he’ll be able to send text messages, which are more
efficient than voice communications. The submersible’s mother ship, the
Mermaid Sapphire, and the 30-foot (9-meter) rigid-hulled inflatable
Prime RHIB are each equipped with two transducers—one on board and
another suspended on a cable about 330 feet (100 meters) below the
water. The sub also has a backup acoustic modem/transponder powered
separately from the sub’s main battery. Once the sub surfaces, it will
also use a VHF marine radio to communicate with the crew."


"If the sub and the crew on the surface lose contact for more than an
hour, a “sub miss” will be declared. The crew will try to reestablish
communication, assess life-support data (oxygen, temperature, etc.),
and, if possible, locate the sub through a number of systems. If this is
unsuccessful, the crew will send an acoustic signal to the sub to
release its weights, freeing the sub to rise to the surface. If that
doesn’t work, the team will wait a number of hours for the weights to
drop on their own following corrosion of the back-up galvanic releases."
 
M

mike

Jan 1, 1970
0
I think dumbfucks like you, who enter a thread simply to make retarded
comments like this, should be shot and dumped into a lye pit.

It is not good to know that there are idiots like you running around.

**** you, you retarded little bitch.

I prefer logic over name calling.

If the roles were reversed and I'd made an offhand comment that I was
sure about something...
And somebody challenged it, presented contrary evidence directly from
the linked website...
and supported it with a logical argument related to structural integrity...

I think I'd re-evaluate my "sureness" about my assertion.
If I were still "sure", I'd present a logical argument supporting
my assertion.

Calling the other guy names seems to be counterproductive to the
search for accuracy...dontchathink?

I think too many people here on the interweb shoot from the hip and
think about it later. Many don't think about it at all.
They just think that name-calling will prove them superior.
How's that workin' out for you?

I'd rather hear a logical supporting argument.
Maybe that's just me.
 
H

hamilton

Jan 1, 1970
0
I'd rather hear a logical supporting argument.
Maybe that's just me.


Archimedes' Lever != logical supporting argument



You are asking way too much here
 
Q

qrk

Jan 1, 1970
0
Did they send up a buoy that sent the data once it surfaced?

Did they use VLF?

The news said he "tweeted" from down there.

I say, if that is so, how did he do it?

Most likely an acoustic telemetry system. You can send voice or data
over these systems.
 
A

Archimedes' Lever

Jan 1, 1970
0
To Quote;

"When necessary, he’ll be able to send text messages, which are more
efficient than voice communications. The submersible’s mother ship, the
Mermaid Sapphire, and the 30-foot (9-meter) rigid-hulled inflatable
Prime RHIB are each equipped with two transducers—one on board and
another suspended on a cable about 330 feet (100 meters) below the
water. The sub also has a backup acoustic modem/transponder powered
separately from the sub’s main battery. Once the sub surfaces, it will
also use a VHF marine radio to communicate with the crew."


"If the sub and the crew on the surface lose contact for more than an
hour, a “sub miss” will be declared. The crew will try to reestablish
communication, assess life-support data (oxygen, temperature, etc.),
and, if possible, locate the sub through a number of systems. If this is
unsuccessful, the crew will send an acoustic signal to the sub to
release its weights, freeing the sub to rise to the surface. If that
doesn’t work, the team will wait a number of hours for the weights to
drop on their own following corrosion of the back-up galvanic releases."


You quote well, but you ain't real bright, boy. "tweet" implies
"connected", not "relayed".

Your quote does NOT answer the question.

AND, on top of that stating he "tweeted from the bottom" means to me
that his machine ON THE BOTTOM had Internet hooks. Otherwise it was sent
by someone else.

Your quoting (apparently unread), however, shows us that he very likely
proxies his message up to the surface, and it then gets sent from a
machine logged into his account from there.

"Texting to the surface..." is NOT "Tweeting from the depths..."

Are you able to see the difference?

The way I would do it is to have a machine on the bottom, a full duplex
communications tether and a machine on the surface being controlled by
the machine on the bottom through that tether. THEN, he could send a
tweet in real time without assistance.

AND the craft on the surface has to have a KVH mobile sat connection
too.
 
A

Archimedes' Lever

Jan 1, 1970
0
I prefer logic over name calling.

You used no logic. You mouthed a petty little wussy boy remark.

So, you ARE that petty little wussy boy. It isn't a name or a name
call, it is a DIRECT DESCRIPTION, you stupid ****. Learn the difference.
 
A

Archimedes' Lever

Jan 1, 1970
0
Calling the other guy names seems to be counterproductive to the
search for accuracy...dontchathink?

You didn't refute anything, you stupid fucktard!

It is obvious youdontthinkatall.
 
A

Archimedes' Lever

Jan 1, 1970
0
Archimedes' Lever != logical supporting argument



You are asking way too much here

Yet another Usenet total retard decides to chime in.

**** off and die, hamiltucky fucktard.
 
A

Archimedes' Lever

Jan 1, 1970
0
Most likely an acoustic telemetry system. You can send voice or data
over these systems.

To the SURFACE SHIP, NOT to the Internet.

Try to get a clue,and actually READ the question the TITLE of the post
asks.

To tweet from below REQUIRES a LIVE connection. I doubt SERIOUSLY that
he had one, and doubt further that a slow method would work at all.

Sorry, but XON and XOFF ain't gonna cut it. He would need tcpip.
Period.
 
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