Argentine navy lost contact with sub [UPDATE: SUB FOUND]

[Von Due]

http://www.bbc.com/news/world-latin-america-42030560

An Argentine submarine is currently not responding to comm attempts. Reasons could be many and as of now the sub is not considered missing. Instead the theory is they have radio problems, according to the Arg. navy. Let's hope that is the case and that the boat with its 44 man crew returns safe and sound.

[Onkel Neal]

Hope they come through okay.

[daft]

I sincerely hope they are all fine and just enjoy some time away from all the bull****. Hopefully they'll get to where they're going.

Also, I love how the Navy spokesman explains to the journalist how **** works:

"It's not that it's lost," he said. "For it to be lost we'd have to look for it and not find it."

[August]

This happened on Wednesday morning. Time is beginning to weigh against the bad radio theory. I also heard that they reported a battery fire just before breaking contact. I hope they are ok but it doesn't look good.

[GoldenRivet]

best case scenario is they put the fire out and all comms are down as a result of the fire

middle case scenario is they emergency surfaced the sub and abandoned ship and are awaiting pickup in the sea

i think we all know what the worst case scenario is

[Von Due]

Yeah all scenarios are plausible but I don't want to speculate (read fantasise) over what has happened. I think we can all agree official statements aren't always precise (Kursk, anyone?) but right now it is the only piece of info out and there is hope that it will end well.

EDIT: The Chilean Airforce, the British RN and the USN are now involved in the search for the missing submarine.

[Jimbuna]

The Argentine navy is stepping up its search in the South Atlantic for a 44-crew submarine that has been out of radio contact for three days.

http://www.bbc.co.uk/news/world-latin-america-42030560

Hopefully she will be found soon and all aboard will be safe.

[STEED]

http://www.subsim.com/radioroom/show...23#post2525923

[fitzcarraldo]

For the crew of the ARA San Juan.
In ethernal patrol.




Eternal Father, strong to save,
Whose arm hath bound the restless wave,
Who bidd'st the mighty ocean deep
Its own appointed limits keep;
Oh, hear us when we cry to Thee,
For those in peril on the sea!

O Christ! Whose voice the waters heard
And hushed their raging at Thy word,
Who walkedst on the foaming deep,
And calm amidst its rage didst sleep;
Oh, hear us when we cry to Thee,
For those in peril on the sea!

Most Holy Spirit! Who didst brood
Upon the chaos dark and rude,
And bid its angry tumult cease,
And give, for wild confusion, peace;
Oh, hear us when we cry to Thee,
For those in peril on the sea!

O Trinity of love and power!
Our brethren's shield in danger's hour;
From rock and tempest, fire and foe,
Protect them wheresoe'er they go;
Thus evermore shall rise to Thee
Glad hymns of praise from land and sea.

[Jimbuna]

I hope you don't mind me merging the threads but it is probably more appropriate because they are the same topic.

Fair winds and following seas to all those lost.

~SALUTE~

[speed150mph]

Jive turkey, one of the guys I'm subscribed to on YouTube, is a retired us navy sonar tech.

He just released this video of him analyzing the sonar graphs of the event that occurred after last contact. He seems to believe that some type of explosion or hull failure occurred, followed a minute later by a full emergancy blow, and possibly the sound of it settling on the bottom.

Link to video

[Rufus Shinra]

May they rest in peace. The sea is a harsh mistress who takes too many brave souls.

[ACR]

Originally Posted by speed150mph

Jive turkey, one of the guys I'm subscribed to on YouTube, is a retired us navy sonar tech.

He just released this video of him analyzing the sonar graphs of the event that occurred after last contact. He seems to believe that some type of explosion or hull failure occurred, followed a minute later by a full emergancy blow, and possibly the sound of it settling on the bottom.

Link to video

thank you very much for the link, i looked at it and learned some details .

however , out of speculation of course , i have another scenario what the three sounds are .

i think they had a battery failure / fire but inutially surfaced and were able to report it ( last contact and irders to return to base ). they fought with a blackout and the need to ventilate the boat , secure the batteries - in very bad weather and high seas. they might in this conditions start to take water (maybe no pumps due to electric problems but need to ventilate the battery fumes) and after about three hours (time between last contact and the recorded sounds ) the boat lost boyancy and started to go down but with an still intact hull and still some air inside . after reaching crush depth the first and most violent sound is the implosion of the hull followed by silence for 80 seconds until the second less noisier sound . thats when the crushed hull hits the bottom and settles down ( and not the sound of sn emergency blow ) . the third , vanishing sound is the settling of the last parts of debris on the bottom and then silence again .

the estimated crush depth is due to my estimate about 450 meters , the sinking of the crushed hull ? - no idea - 10 m/second ? if the hull crushed at 450 meters and further travelled for 80 seconds with 10 m/s the wreckage is at about 1250 meters water depth . that would mean they are at a deep spot an the edge of the continental shelf .

i hope i,m wrong and pray for a miracle and the sailors return !

best regards

[Mr Quatro]

Who's hearing or receiving all of these sounds? Sosus closed down years ago and was a couple of thousand miles from there. As far as I know you can only hear perhaps 75 miles away on another sensor platform like a submarine.

SOSUS. The acronym for Sound Surveillance Under the Sea, SOSUS was a ... Closed down at the end of the Cold War, SOSUS terminals have been either ...

[GoldenRivet]

Originally Posted by Mr Quatro

Who's hearing or receiving all of these sounds? Sosus closed down years ago and was a couple of thousand miles from there. As far as I know you can only hear perhaps 75 miles away on another sensor platform like a submarine.

The "Comprehensive Nuclear Test ban Treaty Organization" was established and provided with the IMS (International Monitoring System and Communications Infrastructure) some of which is still being constructed.

the system consists of:

Seismic Monitors

Hydro-Acoustic Stations

Acoustic Pressure Sensors

Radionuclide Stations which detect radioactive material in the air

the purpose of this equipment is to listen, watch, and feel for signs of nuclear explosions in violation of the Nuclear Test Ban Treaty.

In this case, the organization's Hydro-Acoustic Stations in the South Atlantic registered the loud explosions on sonar approximately 3 hours after the last communication with the San Juan.

as im sure you could imagine, it takes some time to pour through the data, listen to the sounds, sample the air etc

in this case, the CBTBO noted that the sound may correlate to the search to the San Juan and made their data available to the appropriate authorities.

EDIT: in short, the notation of the sound was more or less just stumbled upon - they were not "listening for subs"