MH370 sub launch several days away as signals sought

PERTH, Australia - The hunt for underwater signals from missing Flight MH370 is likely to continue for days before a robot submersible is deployed to comb the seabed, the Australian search chief said Tuesday.

"We need to continue that (search) for several days to the point at which there is absolutely no doubt that the pinger batteries will have expired," Angus Houston said.

"Until we stop the pinger search we will not deploy the submersible."

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