World, Malaysia (BBC): Teams searching for the missing Malaysia Airlines plane have reacquired signals that could be consistent with “black box” flight recorders.
Australian vessel Ocean Shield heard the signals again on Tuesday afternoon and evening, the Australian official leading the search said.
Work was continuing to refine the search area before a submersible could be sent down, he said.
Flight MH370 disappeared on 8 March, carrying 239 people.
It was travelling from Kuala Lumpur to Beijing when it lost contact with air traffic controllers.
Malaysian officials say that based on satellite date, they believe it ended its flight in the southern Indian Ocean, thousands of kilometres from its intended flight path.
The Ocean Shield has been towing a pinger locator to listen for signals from the plane’s flight recorders in waters west of the Australian city of Perth.
It twice acquired signals over the weekend.
On Tuesday, it located the signals again, the first time for five minutes and 32 seconds, and the second time for around seven minutes, Air Chief Marshall Angus Houston said.
“Ocean Shield has now detected four transmissions in the same broad area,” he said. “Yesterday’s signals will assist in better defining a reduced and much more manageable search area on the ocean floor.
“I believe we are searching in the right area but we need to visually identify aircraft wreckage before we can confirm with certainty that this is the final resting place of MH370.”