MH370 search yet to target most likely crash site: Inmarsat
Inmarsat say the search for missing flight MH370 is yet to target the most likely crash site, pictured is the Japan Coast Guard watching for debris in the search zone on April 1, 2014 - by Paul Kane
Inmarsat's scientists told the BBC's Horizon programme that they had calculated the plane's most likely flight path and a "hotspot" in the southern Indian Ocean in which it most likely came down.
The flight lost contact on March 8 en route from Kuala Lumpur to Beijing with total of 239 passengers and crew on board.
Hourly pings sent by the plane were received by Inmarsat's spacecraft, leading scientists to calculate its likely path.
Australian naval vessel Ocean Shield was dispatched to investigate, but before reaching the likely site, began to detect a signal that it believed was coming from the plane's black box, Inmarsat told the BBC programme.
Two months were spent searching 850 sq km of sea bed north west of Perth, but the source of the "pings" was not found and a submersible robot found no evidence of the airliner.
"It was by no means an unrealistic location but it was further to the north east than our area of highest probability," Chris Ashton at Inmarsat told Horizon.
Experts from the satellite firm modelled the most likely flight path using the hourly pings and assuming a speed and heading consistent with the plane being flown by autopilot.
"We can identify a path that matches exactly with all those frequency measurements and with the timing measurements and lands on the final arc at a particular location, which then gives us a sort of a hotspot area on the final arc where we believe the most likely area is," explained Ashton.
After coming under criticism from relatives over the futile search, Malaysia's civil aviation authority and Inmarsat last month decided to release the raw data.
However, its complexity has led to few independent conclusions being drawn about the likely crash site.
Malaysian Selamat Umar, whose son Mohamad Khairul Amri was on the ill-fated jetliner, questioned the motives behind the data release.
"I am not convinced at all by the data," he said. Why are they releasing it now? Before when we asked for it, they did not want to release it. What can we do with it now?
"I think they could have made some changes to the data," Selamat, 60, added.
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