[Peetwo]

Captain's Log 03.05.17: DOI archive entry & Kirill CVR/FDR pingers.


Via MH370 criminal act thread:

Ocean Shield's "PINGS" Revisited.

Kirill Prostyakov‏ (https://twitter.com/kprostyakov) has released some very interesting information on the Famous TPL-25 ping detections obtained by Ocean Shield.

He thinks the discounted ping detection by HMS Echo on 2-Apr-2014 was in fact exactly on top of the 5-Apr-2014 detections by ADV Ocean Shield.

The quick takeaway is that he thinks that the pings were real, and that the CVR and FDR are 35 kilometres apart, on an azimuth axis of 167 degrees true.

The direct implication of which is, that the aircraft may have (probably) broke up in flight, at high altitude. Moreover, the apparent tensile failure of control surface elements, (I presume he means Item 8 - the flap track fairing rear aerodynamic cone cover) and the actual presence of cabin debris indicates breakup at altitude, because he thinks that if the aircraft collided with the water intact, all debris would get compressed.

His data and computer code is here:
https://github.com/kprostyakov/beacon_location
6.7Mb File (ZIP)
https://codeload.github.com/kprostyakov/...zip/master

There is some interesting "reasoning" in his presentation here:
https://github.com/kprostyakov/beacon_lo...slides.odp
2.36Mb File
https://raw.githubusercontent.com/kprost...slides.odp


His twitter posts of 2nd May 2017 are summarised as follows:

The CVR had a better battery than the FDR, and he thinks that the TPL survey was done below refraction cone (layer ?), thus he seems to think that the actual "detections" were made when  the TPL-25 was pulled up (through the layer ?) during Ocean Shield's turns at the ends of the straight towing runs.

Locations on map.
Image Map-CVR-FDR.jpg

The FDR and CVR separated by 35km at sea bottom at approx 167 deg azimuth (N->S). Mid-air breakup.

The code uses real bathymetry and does ray tracing to get transmission loss for all points on the bottm outside UAV survey limits. Red = can hear.

FDR transmission map - the source is likely to be in NW corner not covered by UAV due to being at a depth greater than 5,000 metres.

Image FDR-1.jpg

CVR transmission map - at reported 27kHz (lower parasite mode around battery depletion time)

Image CVR-1.jpg

~31 kHz in first video - possibly pinger #2 at 1.02sec repetiton rate.
More distant, as only lower frequency parasite band left.



05-Apr-2014 ADV Ocean Shield DID detect 37.5kHz signal.
33.3 peak is LSB, USB @ 41.6kHz.  Why modulation though ?

And from Malaysian MOT MH370 Annex 13 investigation webpage:

DEBRIS EXAMINATION REPORTS - UPDATED 30 APRIL 2017 (81 pages)

---

SUMMARY OF POSSIBLE MH370 DEBRIS RECOVERED - UPDATED 30 APRIL 2017 (14 pages)

I guess one step closer to the release of the MH370 Annex 13 JIT final report -

However off Victor's blog "V" makes the following very valid points in regards to the ATSB history of obfuscation on 'Final Reports' and the Malaysian historical disinformation and obfuscation of the MH370 search and investigation to date..

ventus45 says:
May 2, 2017 at 10:42 pm
@TBill

” I suppose any serious efforts to 2nd guess or re-interpret the data must wait until the final report.”

“Wait for the final report” – or variations of it.

How many times have I heard that over the years, concerning both this, and other accident investigations.

Those familiar with the ATSB’s “track record” on Mildura, and in particular, the Norfolk Island ditching of the PelAir Westwind, will know full well what I mean. My’s track record on MH370 is many times worse than the ATSB’s.

My has made numerous “promises” in the past, that have not been honoured. From very early on, and still very near and dear to Victor’s heart, (I presume), was the early promise by MY to him personally, of providing the detailed post Penang radar data. Did you ever get it Victor ? Silly question I know.

What are we going to do when “the final”, turns out to be as useful as “the interims”. Cry and chuck some tanties like a bunch 4 year olds ?

No. I think it is high time we pre-empt the “fob off” that the final will almost certainly be, and made a detailed list of what we “demand” is included, in detail, and publish it, very soon.

To that end Victor, a new thread ? “What we demand to know” or similar ?

MTF...P2

Ps Oops thank you for that "V"   - should be fixed now...