Flight 370 'was on autopilot'

The survey vessel Fugro Equator is mapping the ocean floor as the search for the missing plane continues. REUTERS/Fugro Communications Services Team
The survey vessel Fugro Equator is mapping the ocean floor as the search for the missing plane continues. REUTERS/Fugro Communications Services Team
Malaysia Airlines Flight MH370 was most likely on autopilot when it crashed into the Indian Ocean further south than previously thought, Australian officials say, as they chart the next phase of a so far fruitless search.

The new analysis comes more than 100 days after the Boeing 777, carrying 239 passengers and crew, disappeared on March 8 shortly after taking off from Kuala Lumpur bound for Beijing.

Investigators say what little evidence they have to work with suggests the plane was deliberately diverted thousands of kilometres from its scheduled route before eventually plunging into the Indian Ocean.

The search was narrowed in April after a series of acoustic pings thought to be from the plane's black box recorders were heard along a final arc where analysis of satellite data put its last location.

But a month later, officials conceded the wreckage was not in that concentrated area, some 1600km off the northwest coast of Australia, and the search area would have to be expanded.

"The new priority area is still focused on the seventh arc, where the aircraft last communicated with satellite. We are now shifting our attention to an area further south along the arc," Australian Deputy Prime Minister Warren Truss told reporters in Canberra.

Truss said the area was determined after a review of satellite data, early radar information and aircraft performance limits after the plane diverted across the Malaysian peninsula and headed south into one of the remotest areas of the planet.

"It is highly, highly likely that the aircraft was on autopilot, otherwise it could not have followed the orderly path that has been identified through the satellite sightings," Truss said.

The next phase of the search is expected to start in August and take a year, covering some 60,000 sq km at a cost of A$60 million ($56 million) or more. The search is already the most expensive in aviation history.

The new priority search area is around 2000 km west of Perth, a stretch of isolated ocean frequently lashed by storm force winds and massive swells.

In a 55-page report, the Australian Transport Safety Board outlined a how investigators had narrowed down the possible final resting place from thousands of possible routes, while noting the absence of communications and the steady flight path.

"Given these observations, the final stages of the unresponsive crew/hypoxia event type appeared to best fit the available evidence for the final period of MH370's flight when it was heading in a generally southerly direction," the ATSB report said.

Two vessels, one Chinese and one from Dutch engineering company Fugro, are currently mapping the sea floor along the arc, where depths exceed 5000 metres in parts.

A tender to find a commercial operator to conduct the sea floor search closes on Monday.

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