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China6329 Posts
It is reported that a Chinese search vessel detected a signal of 37.5KHz frequency pulsing every second in Southern Indian Ocean, which is indeed the behavior of a Black Box's Underwater Locating Beacon. http://news.sina.com.cn/c/2014-04-05/185029872980.shtml (Chinese with news video from CCTV)
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On April 05 2014 20:47 digmouse wrote:It is reported that a Chinese search vessel detected a signal of 37.5KHz frequency pulsing every second in Southern Indian Ocean, which is indeed the behavior of a Black Box's Underwater Locating Beacon. http://news.sina.com.cn/c/2014-04-05/185029872980.shtml (Chinese with news video from CCTV)
Oh boy.....
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They detected it for 15 minutes Friday but were surprised (they we in the middle of no where outside of designated search areas). They detected it for 90s today and couldn't get a recording either around here.
![[image loading]](http://i.imgur.com/B34hkef.png)
Where the under water topography looks like:
![[image loading]](http://i.imgur.com/bYEBxSx.png)
The signal might be being blocked by under water formations.
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Where did you get that underwater map?
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On April 06 2014 06:11 Whole wrote: Where did you get that underwater map? I was wondering too. Very neat.
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Looks like an old National Geographic map.
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Heard something about the plane being found in the Indian Ocean... Reading the last few pages of this thread makes me think it didn't really happen though
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It looks like the Ocean Shield (the AU ship with the US towed pinger locator) picked up a signal 90 minutes ago north of where the Chinese were at. This was at the live press conference so reports in writing haven't been thrown up on CNN yet.
Apparently the Chinese have picked up the signal yet again (this is referring to the Saturday morning).
I think at this point its kinda doubtful that they are getting trolled by a whale or anything. I guess we should be cautiously optimistic now.
Edit: I stole the maps from http://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost-464.html.
The guys on this forum know a lot, one guy even took part in a similar search a few decades ago. You can read his opinion of the current search here (its interesting regardless):
http://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost-462.html#post8418871
Edit 2: Apparently the CNN twitter is referring to the the 90 second pick up by the Chinese yesterday.
Edit:3:
The AU signal pickup by the Ocean Shield was 300 nm north so it may be a false positive unless water conditions are permitting it to travel extremely far.
From http://www.airliners.net/aviation-forums/general_aviation/read.main/6045158/#292
Conference has ended. Here are the major takeaways since I was editing my previous post and you may not have seen all the changes.
1. Three separate acoustic events they are looking at right now: a. one by Haixun 01 on Friday night Perth time that was of a "short" duration; b. a second event of about 90 seconds at 15.47 Saturday Perth time also by Haixun 01 about 2km distant from first detection; and, c. a third event about 90 minutes before the start of the press conference (Sunday, about 10am Perth time) by the Ocean Shield, about 300 nm away from the Haixun's location.
2. The Haixun's events were described as being "consistent" with ULBs. There was no information about the Ocean Shield's detection yet.
3. Based on revisions from Inmarsat, the plane is more likely to be in the southern portion of the current search zone. This is where the Haixun 01 heard the pings on Friday and Saturday.
4. HMS Echo is en route to Haixun 01's location and will be there within 14 hours.
5. Ocean Shield will remain on station until at least early afternoon Sunday Perth time to investigate the acoustic event they heard on Sunday morning Perth time. If they do decide it's nothing, it will take about 2-3 hours to retrieve the towed pinger locator, about 24 hours to reach the Haixun's location, and about 2-3 hours to redeploy the locator.
6. The Australians first heard about the Friday event from media, and were informed shortly thereafter officially by China. The second event was first communicated to the Australians and then media reports broke.
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Worth noting that the black box will be getting dangerously close to its 30-day limit here.
Pretty tense, tbh.
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On April 06 2014 13:04 Antisocialmunky wrote:It looks like the Ocean Shield (the AU ship with the US towed pinger locator) picked up a signal 90 minutes ago north of where the Chinese were at. This was at the live press conference so reports in writing haven't been thrown up on CNN yet. https://twitter.com/KatyTurNBC/status/452656878762201088Apparently the Chinese have picked up the signal yet again (this is referring to the Saturday morning). https://twitter.com/CNNjoe/status/452659895947374593I think at this point its kinda doubtful that they are getting trolled by a whale or anything. I guess we should be cautiously optimistic now. Edit: I stole the maps from http://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost-464.html. The guys on this forum know a lot, one guy even took part in a similar search a few decades ago. You can read his opinion of the current search here (its interesting regardless): http://www.pprune.org/rumours-news/535538-malaysian-airlines-mh370-contact-lost-462.html#post8418871Edit 2: Apparently the CNN twitter is referring to the the 90 second pick up by the Chinese yesterday. Edit:3: The AU signal pickup by the Ocean Shield was 300 nm north so it may be a false positive unless water conditions are permitting it to travel extremely far. From http://www.airliners.net/aviation-forums/general_aviation/read.main/6045158/#292Show nested quote + Conference has ended. Here are the major takeaways since I was editing my previous post and you may not have seen all the changes.
1. Three separate acoustic events they are looking at right now: a. one by Haixun 01 on Friday night Perth time that was of a "short" duration; b. a second event of about 90 seconds at 15.47 Saturday Perth time also by Haixun 01 about 2km distant from first detection; and, c. a third event about 90 minutes before the start of the press conference (Sunday, about 10am Perth time) by the Ocean Shield, about 300 nm away from the Haixun's location.
2. The Haixun's events were described as being "consistent" with ULBs. There was no information about the Ocean Shield's detection yet.
3. Based on revisions from Inmarsat, the plane is more likely to be in the southern portion of the current search zone. This is where the Haixun 01 heard the pings on Friday and Saturday.
4. HMS Echo is en route to Haixun 01's location and will be there within 14 hours.
5. Ocean Shield will remain on station until at least early afternoon Sunday Perth time to investigate the acoustic event they heard on Sunday morning Perth time. If they do decide it's nothing, it will take about 2-3 hours to retrieve the towed pinger locator, about 24 hours to reach the Haixun's location, and about 2-3 hours to redeploy the locator.
6. The Australians first heard about the Friday event from media, and were informed shortly thereafter officially by China. The second event was first communicated to the Australians and then media reports broke.
You're trolled by a whale gag made me chuckle thanks
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It appears the Ocean Shield has picked up pings twice just like the Chinese but 600 km away. The first for 2 hours 20 minutes, the second for 30 seconds. What's encouraging is they detected 2 different sounding pings which is what you would expect from both the Flight Recorder and Cockpit Voice Recorder. They have a recording so analysis is being done.
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Wait, so we have confirmed black-box-like pings from two different areas separated by six hundred km?
This is starting to look like the "we found debris!" game all over again.
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There's been reports from 4 vessels but everything other than the Chinese and Australian/US ones have been discounted.
The Chinese reports seems more suspect than the Australian/US ones because the Chinese didn't get recordings and there's a question on whether or not their methodology is reasonable. They detected a signal using a hydrophone on a stick held underwater from a inflatable boat after all. This doesn't rule the Chinese reports out, only make it less likely they are correct. On the other hand, water conditions are unpredictable and hard to ascertain. Those have huge effects on sound travel under water so maybe the Chinese got supremely lucky.
Since the Australian/US one has been recorded using a proper deep sea probe and they've reported that 2 different pings were detected a reasonable distance apart, that's probably the best candidate.
... unless a Megalodon is swimming around with it lodged in its teeth.
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Heard on Aussie news that an Australian boat found a signal again and is about to deploy an un-manned sub to go down and take a peek.
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Wow, I didn't know that river deltas leave such a big mark on the ocean floor. For example, that Ganges Cone is huge, so is the one for Indus.
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