Underwater search for black box begins

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IOL pic apr4 malaysia plane search bluefin black box pinger

Reuters

The Bluefin 21, the Artemis autonomous underwater vehicle (AUV), is hoisted back on board Australia's Ocean Shield after a successful buoyancy test in the southern Indian Ocean as part of the continuing search for the missing Malaysian Airlines Flight MH370 in this picture released by the US Navy on April 4, 2014. Picture: US Navy, Mass Communication Specialist 1st Class Peter D. Blair, via Reuters

Perth, Australia -

Crews searching for the missing Malaysia Airlines jet launched a targeted underwater hunt on Friday for the plane's black boxes along a stretch of remote ocean, with just days left before the devices' batteries are expected to run out.

The Australian navy ship Ocean Shield, which is dragging a towed pinger locator from the US Navy, and the British navy's HMS Echo, which has underwater search gear on board, will converge along a 240km track in a desolate patch of the southern Indian Ocean, said Angus Houston, the head of a joint agency coordinating the search.

The plane's data recorders emit a ping that can be detected by the equipment on board the ships. But the battery-powered devices stop transmitting the pings for about 30 days after a crash - meaning searchers have little time left before the batteries on Flight MH370's black boxes die out. Locating the data recorders and wreckage after that is possible, but incredibly difficult.

The area the ships are searching was chosen based on hourly satellite pings the aircraft gave off after it vanished from radar March 8 on a flight from Kuala Lumpur to Beijing. That information, combined with data on the estimated speed and performance of the aircraft, led them to that particular stretch of ocean, Houston said.

“The area of highest probability as to where the aircraft might have entered the water is the area where the underwater search will commence,” Houston said. “It's on the basis of data that only arrived very recently and it's the best data that is available.”

Air crews and ships have been searching for weeks for the Boeing 777, but have so far found no trace of the plane. - Sapa-AP


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