Australia's Ocean Shield has picked up two more underwater signals in the Southern Indian Ocean, possibly from aircraft data recorders.
Crews searching for flight 370 heard the signals -- one lasting more than five minutes, the other 7 minutes yesterday…in the same area a U-S listening device detected sounds over the weekend.
"I have confidence we're in the right area but I'm not going to give the final confirmation until somebody has seen wreckage," said Angus Houston, head of the Joint Agency Coordination Center.
The battery life on the data recorders is only about a month. The boeing triple-7 and the 239 people on board disappeared March 8-th so that window is closing quickly.
Pings from the flight recorders can help to refine the search area...so crews can send a small U-S Navy submersible 14-thousand feet down to map the ocean floor.
"Hopefully in a matter of days we will be able to find something on the bottom that might confirm that this is the last resting place of MH370," said Angus.
Investigators have not said how long they will wait to deploy the sub once they've determined they've heard the last ping - officials will only say that time is "not far away."
Scattered showers are expected to hamper search efforts today.
(Susan McGinnis, CBS News)
Copyright 2015 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.