Australia on Friday said radars had failed to detect any sign of a missing Malaysian jetliner and it was switching to skilled observers to spot any debris in the remote southern Indian Ocean.
The Australian Maritime Safety Authority (ASMA) is coordinating the hunt for Malaysia Airlines flight MH370 in the inhospitable region between the mainland and Antarctica, in an area 2,500 kilometres southwest of Perth.
“Noting that we got no radar detections yesterday, we have replanned the search to be visual,” the head of ASMA’s emergency response division John Young said.
“So the aircraft flying relatively low, very highly trained and skilled observers looking out of the aircraft windows, and looking to see objects.”
That meant the search aircraft would have to fly more closely together, Young said, adding, “we will need more aircraft for a search of that type”.
Five planes were in the air Friday — three Australian RAAF P3 Orions, one long-range corporate jet and a United States Navy P8 Poseidon — as part of a global effort to find the Boeing 777 which vanished on March 8.
Young said one aircraft was on its way back, two were in the search area, and two more were on their way with the last scheduled to leave the zone by about 1100 GMT.
He said the weather was suitable for searching, but officials have so far drawn a blank in finding anything from the plane which went missing en route from Kuala Lumpur to Beijing with 239 onboard.
“We have no sighting yet,” Young said.
Australia is tasked with scouring the massive southern sector of the possible flight path of the plane which appears to have been deliberately diverted mid-flight.
Authorities have gradually reduced the search area off Australia, with satellite imagery released Thursday apparently showing two objects which might be from the plane.
“Although this search area is much smaller than we started with it nonetheless is a big area when you are looking out the window and trying to see something by eye,” Young said.