Mystery of Missing Malaysia Flight

No sign of Malaysia plane as search expands into Indian Ocean.
3:00 | 03/21/14

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Transcript for Mystery of Missing Malaysia Flight
as we come on the air tonight. It is daybreak in that part of the world, that key part in the Indian ocean off of Australia, right there, the route most taken by that missing jet and the route they're concentrating on tonight. Possible debris marks from the plane this week. Just look at the arsenal this now morning, ABC's David Wright, the only American reporter onboard that secret naval ship, the infrared cameras the radar being deployed. Team coverage on it. We repeatedly heard from you, why no submarines. But we begin with David as they search again. Reporter: Good evening, David. As dawn breaks here, the search resumes. More search planes joining the fleet. Six planes from Australia and New Zealand will be coming square miles. A search effort of unprecedented scale, combining state of the art technology and painstaking effort. Six search planes, out from dawn until dusk. Dropping marker buoys. Planting cords nates. And scanning the waves. But, so far, coming up empty. The eye in the sky, pinpointing these objects out on open ocean. The best lead yet. The smaller one just 15 feet long, the length of a car. Probably awash with water, Reporter: But getting a closer look is proving to be difficult. About the most inaccessible spot you could imagine on the face of the Earth. Reporter: The ocean here is dynamic. Watch this boat tossed by high seas. The waves here up to 20 feet high, winds howl, currents tear in different directions, conditions making tracking any debris a challenge. The search planes have sensitive radar, infrared cameras and high-res optical lenses. But, as we witnessed yesterday abroad that U.S. Navy p-8, in choppy seas, a pod of dolphins can look like debris from a distance. The only reliable instrument? Distinctly low tech. The human eye. We call it the mark one mod one eyeball. Reporter: Say again? The mark one, mod one eyeball. It's old fashioned but it works. Reporter: Eventually, there may be eyes under water too. Submersibles like the Remus 100, used to help locate air France 447. Painstaking and costly work. Cost to the U.S. Taxpayers alone, about $2.5 million. A small price to pay for answers. For the first time we're hearing from the family the lead crew member on that flight. Bob woodruff tonight. Reporter: This is the home of Patrick Gomez, the chief steward of flight 370, three daughters, one son, a one grandson and his wife Jackie says he keeps calling his cell phone, praying that he is still alive. Hoping that he'll reply. Reporter: Vigils from Pakistan, China, to Malaysia and more. But growing anger that the Malaysian government isn't being honest. I the we all need closure. Reporter: He's still waiting for his grandfather, he has no idea what happened. What are you going to tell Rafael? He still thinks that grandpa is at work. He still doesn't understand. Maybe good has a good plan. Reporter: Since he's gone missing, Patrick's family has been burning this candle, hoping he finds his way home. Bob woodruff, ABC news. Bob woodruff reporting in again tonight. We're now 14 days into this,

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

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