Crews Prepare Ocean Floor Search for Flight MH370

The Ocean Shield, an Australian vessel outfitted with a U.S. Navy pinger locator, will lead the search.
3:00 | 03/30/14

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Transcript for Crews Prepare Ocean Floor Search for Flight MH370
latest for the hunt on flight 370. More planes joining the search today. And a new military man taking over the international search. The batteries of the black boxes set to die as early as next week. And get the latest from David Wright in Perth, Australia. Reporter: Even before any wreckage is confirmed, they are thinking about the next phase. This is the ocean shield. It's being fit with a U.S. Navy pinger locater to listen to the block boxes. This 6500 ton vessel will be the lynch pin in the next phase, looking under the water for the heavy wreckage that my lie two miles below the surface on the ocean floor. A U.S. Navy crew will listen for the faint ping from the flight data and cockpit voice recorders. This is an acoustic beacon on it. Reporter: Almost on top of it to hear it. We cannot search the entire ocean. We need to reduce the search area to be effective. Reporter: As of today, the search area is still the size of New Mexico. Today the ten search planes out spotting debris had multiple contacts. But not known if any are confirmed from flight 370. Three brightly colored objects yesterday turned out to be garbage. Nothing significant. And today in coup what la lamb purr, they demanded they apologize for the handling of the search. Malaysian officials are no longer calling the staffs. Today this highly-respected member of the Australian joint chiefs of staff took over. And the pingers are expected to run out in a week. People use the metaphor, a needle in a haystack. You? It's a needle in a haystack with a blindfold on. And after it stops, it's that with thick gloves. Reporter: This is the staging area. How long a journey are you preparing for? 40 days. Reporter: It'll take three or four days to get to the search area. Hopefully by then we'll have confirmation that flight 370 has been found. Dan, bianna. Hopefully being the keyword. Meanwhile, the deadline to sign up for obamacare is

This transcript has been automatically generated and may not be 100% accurate.

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