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Submarine used for tourist visits to Titanic wreckage goes missing in the Atlantic Login/Join 
Lost
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ACCU-STRUT FOR MINI-14
"Pen & Sword as one."
 
Posts: 17338 | Location: SF Bay Area | Registered: December 11, 2003Reply With QuoteReport This Post
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I wonder what the monkey’s fists are for?

Besides that, it looks like much of the carbon fiber tube collapsed into the titanium hatch-door thing.
 
Posts: 12388 | Location: SWFL | Registered: October 10, 2007Reply With QuoteReport This Post
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Thanks. For sharing. That’s a very lonely place to be when something goes wrong.
 
Posts: 839 | Location: Orange County, CA | Registered: December 21, 2005Reply With QuoteReport This Post
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quote:
Originally posted by Fly-Sig:
That water was moving at very high speed. Someone posted it was supersonic. In any case it was moving fast, which means it had tremendous momentum which takes tremendous force to stop. It would compress the air to a higher pressure than the static water pressure of 5000 psi. Think of that high speed column of water as a piston slamming into the air at the far end of the tube.
The speed of sound in water would be much faster than in air, which we commonly think about. From Wikipedia:

The speed of sound in an ideal gas depends only on its temperature and composition. The speed has a weak dependence on frequency and pressure in ordinary air, deviating slightly from ideal behavior. In colloquial speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: typically, sound travels most slowly in gases, faster in liquids, and fastest in solids. For example, while sound travels at 343 m/s in air, it travels at 1,481 m/s in water (almost 4.3 times as fast) and at 5,120 m/s in iron (almost 15 times as fast). In an exceptionally stiff material such as diamond, sound travels at 12,000 m/s (39,000 ft/s) – about 35 times its speed in air and about the fastest it can travel under normal conditions.


_________________________________________________________________________
“A man’s treatment of a dog is no indication of the man’s nature, but his treatment of a cat is. It is the crucial test. None but the humane treat a cat well.”
-- Mark Twain, 1902
 
Posts: 9520 | Location: Northern Virginia | Registered: November 04, 2005Reply With QuoteReport This Post
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quote:
Originally posted by trapper189:
I wonder what the monkey’s fists are for?

Bopping sharks on the nose?
 
Posts: 7582 | Location: Idaho | Registered: February 12, 2007Reply With QuoteReport This Post
Peace through
superior firepower
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Handles
 
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Lost
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^Yes...

quote:
So, most ROV's have a manipulator, or an arm which can be used to grab things and move things around. The monkey's fist makes it easier to grab onto, as well as indicating what needs to be grabbed. Also, if the thing you're working with falls to the bottom, the fist will float, making it easier to spot and get hold of.



ACCU-STRUT FOR MINI-14
"Pen & Sword as one."
 
Posts: 17338 | Location: SF Bay Area | Registered: December 11, 2003Reply With QuoteReport This Post
Partial dichotomy
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Thanks for the update.




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Posts: 39756 | Location: SC Lowcountry/Cape Cod | Registered: November 22, 2002Reply With QuoteReport This Post
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Old thread warning!

On 2/7/2025, the Coast Guard released the audio of the implosion heard by a NOAA bouy 900 miles away:



"A National Oceanic and Atmospheric Administration (NOAA) moored passive acoustic recorder, approximately 900 miles from the Titan submersible implosion site, records the suspected acoustic signature of the Titan submersible implosion, June 18, 2023. The U.S. Coast Guard’s Titan Marine Board of Investigation (MBI) released the audio as part of the investigation and as an investigation exhibit. The recording was provided to the MBI by NOAA, which approved its use in the investigation and public release. (Audio courtesy of the Coast Guard Titan Marine Board of Investigation)"
Link
 
Posts: 12388 | Location: SWFL | Registered: October 10, 2007Reply With QuoteReport This Post
A Grateful American
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(Old joke warning!)




"Well, the front fell in."




"the meaning of life, is to give life meaning" Ani Yehudi אני יהודי Le'olam lo shuv לעולם לא שוב!
 
Posts: 44994 | Location: Box 1663 Santa Fe, New Mexico | Registered: December 20, 2008Reply With QuoteReport This Post
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Well, there are … regulations governing the materials they can be made of

What materials?

Well, Cardboard’s out

And?

No cardboard derivatives

Like paper?

No paper, no string, no carbon fiber
 
Posts: 12388 | Location: SWFL | Registered: October 10, 2007Reply With QuoteReport This Post
Get Off My Lawn
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"I’m not going to read Time Magazine, I’m not going to read Newsweek, I’m not going to read any of these magazines; I mean, because they have too much to lose by printing the truth"- Bob Dylan, 1965
 
Posts: 17887 | Location: Texas | Registered: May 13, 2003Reply With QuoteReport This Post
Ignored facts
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quote:
Originally posted by trapper189:


On 2/7/2025, the Coast Guard released the audio of the implosion heard by a NOAA bouy 900 miles away:



900 miles away. that's remarkable.


.
 
Posts: 11325 | Location: 45 miles from the Pacific Ocean | Registered: February 28, 2003Reply With QuoteReport This Post
Thank you
Very little
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Sound underwater travels at approximately 1500 meters per second, so to travel 900 miles (which is roughly 1,448,000 meters), it would take around 965 seconds (or about 16 minutes).

Calculation:
900 miles = 1,448,000 meters [conversion]
Speed of sound underwater = 1500 meters/second
Time = Distance / Speed = 1,448,000 meters / 1500 meters/second = 965 seconds
 
Posts: 25063 | Location: Gunshine State | Registered: November 07, 2008Reply With QuoteReport This Post
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^^^ I thought the water would have enough damping effect such that the signal to noise ratio would be next to nothing at 900 miles. That's the part that amazes me, that it can even be heard so far away.
 
Posts: 11325 | Location: 45 miles from the Pacific Ocean | Registered: February 28, 2003Reply With QuoteReport This Post
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Noise and water are a pretty incredible combination.

Forty years ago I had a room mate in California,
He was retired from the navy.

His last job involved listening to noises in the ocean on the California coast.


This was way pre computer tools.

They listened to 80 recordings of. . . . Stuff.

In order to identify motors, natural sounds and sort out anomaly stuff.


Computers ( he said) increased their abilities to identify, ten fold in a years time.

Way back then most of there abilities were classified.





Safety, Situational Awareness and proficiency.



Neck Ties, Hats and ammo brass, Never ,ever touch'em w/o asking first
 
Posts: 55488 | Location: Henry County , Il | Registered: February 10, 2004Reply With QuoteReport This Post
Freethinker
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Because of how sound travels, in general the denser the medium the better it propagates through that medium. Water is denser than air, so sounds can be heard farther in the ocean.




6.4/93.6

“It is peace for our time.”
— Neville the Appeaser
 
Posts: 48142 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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quote:
For example, while sound travels at 343 m/s in air, it travels at 1481 m/s in water (almost 4.3 times as fast) and at 5120 m/s in iron (almost 15 times as fast). In an exceptionally stiff material such as diamond, sound travels at 12,000 m/s (39,370 ft/s) – about 35 times its speed in air and about the fastest it can travel under normal conditions.
Link


_________________________________________________________________________
“A man’s treatment of a dog is no indication of the man’s nature, but his treatment of a cat is. It is the crucial test. None but the humane treat a cat well.”
-- Mark Twain, 1902
 
Posts: 9520 | Location: Northern Virginia | Registered: November 04, 2005Reply With QuoteReport This Post
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quote:
Originally posted by bendable:

...Forty years ago I had a room mate in California, He was retired from the navy.

His last job involved listening to noises in the ocean on the California coast...


66 Years of Undersea Surveillance

By Captain Brian Taddiken, U.S. Navy and Lieutenant Kirsten Krock, U.S. Navy

February 2021 Naval History Volume 35, Number 1

Just over 66 years ago, one of the Navy’s most secretive communities began. Its members went by the code word SOSUS, which means “Sound Surveillance System.” A new front line in the Cold War, they had one mission: FIND SUBMARINES.

Lack of knowledge and information concerning oceanographic and acoustic conditions off the continental coasts hampered the U.S. Navy’s efforts against the submarine threat during World War II. It was apparent the German Navy had better information and a better understanding of how to use the Atlantic Ocean. Consequently, since the war, the U.S. Navy has maintained a continuous program of oceanographic surveys designed to provide more detailed information on currents, temperature, salinity, and other factors that comprise the oceanic environment and affect the transmission of sound in saltwater. The U.S. Navy was determined never to again lag behind others in its knowledge of this vital battlespace.

In early 1950, on the recommendation of the Committee on Undersea Warfare to the Assistant Chief of Naval Operations, Project Jezebel was born—a long-range program dedicated to the detection, classification, and localization of enemy submarines...

Complete article:

https://www.usni.org/magazines...ndersea-surveillance
 
Posts: 16167 | Location: Eastern Iowa | Registered: May 21, 2000Reply With QuoteReport This Post
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