To watch Deep Dive MH370 on YouTube, click the image above. To listen to the audio version on Apple Music, Spotify, or Amazon Music, click here.
For a concise, easy-to-read overview of the material in this podcast I recommend my 2019 book The Taking of MH370, available on Amazon.
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After the Australian government mathematically analyzed the Inmarsat data to figure out where MH370 had run out of fuel in the southern Indian Ocean, they hired a Dutch maritime survey company called Fugro to search a 23,000-square-mile rectangle that encompassed most of the possible endpoints. As we described in Episode 1, the first of three ships assigned to the job began scanning the seabed in October 2014. By the following April, it was clear that the plane was not in fact in the search area, so the Australians doubled its size and asked Fugro to keep going.
But nothing was found.
In November 2016 the ATSB issued a report called “MH370 — First Principles Review” in which they tried to grapple with their failure.
As we’ve talked about before, the Inmarsat data doesn’t work like GPS; it doesn’t give you latitutude and longitude coordinates. Instead, there are a lot of possible routes the plane could have taken that would match the data; the trick to understanding where the plane went is to carry out what’s called a “Monte Carlo simulation” in which you generate a vast number of possible routes and then compare each one to the data to see how well it matches.
Each route has an endpoint; the universe of good-matching routes presents you a universe of endpoints, and these are distributed in a fried-egg pattern that will be familiar to viewers.
A corollary of this dynamic is that for every endpoint in the southern ocean, there is a route that ends there—a story of how fast it flew, how many turns it made, and so forth. What’s important to understand is that in broad terms, it’s physically possible for the plane to fly to any point on the 7th arc by the time of the final ping, but in order to get there in a probabilistially plausible manner you’re left with a much smaller universe of possible enpoints. Other end points are possible but require super unlikely combinations of turns and speed changes. We discussed this in some detail in Episode 11.
Continue reading Deep Dive MH370 #26: Restarting the Search