Hunt for ‘pings’ to take days before sub search

PERTH: Ships listening for underwater signals from Flight MH370 have logged no more “pings” and will spend several more days trying to pinpoint a crash site before a mini-sub is launched to scour the seabed, searchers say.

A month to the day since the Boeing 777 vanished with 239 people on board, time is running out to detect further signals as the batteries in beacons on the jet’s black box data recorders reach their expiry date.