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Could be directed at a patch of ocean like this? >> absolutely. and of course, if you were the crew member on board, just as we were on the station, when there was a volcano, we would do our best to get pictures of that. this is the same thing. we have video cameras staring at the world. theres a company called earth cast that has two cameras staring at the world mounted on a platform and the crew members will be looking with hand held cameras and just recently through a company called planet la...

>> the smaller ones are only going to down to 5,000 feet. the next is a larger device thats 15 by 25 feet. its very large because it adds a lot of battery capability and hydraulics capability. >> reporter: the auvs can go as deep as 20,000 feet sending acoustic pulses to the sea floor to find debris and then maps are drawn to guide search teams. they can even find things up to 300 feet under the sea floor. the search zone needs to be narrowed down first. this auv can only search eight square mil...

Cockpit if the crew was overcome with smoke or fumes or had to handle an emergency like that. >> well, what we will show you is what should happen and then you will know the differences of what we know of 370, and like 370, of course, on the route to beijing and taken off from kuala lumpur and we would have reached that point coming out of kuala lumpur where you turn off of the fasten seat belt, and then the crew would be up here where everybody in the back is relaxing, and then we would get som...

A big piece of something, say the chinese, floating in the southern indian ocean is the only thing resembling a clue right now in the disappearance of an airliner with hundreds of people on board. its not a perfect picture, but chinese officials say one of their satellites took it a few days ago and the white thing might be wreckage from the 777 that vanished more than two weeks ago now. search crews are only now able to get started again as the sun comes up in the south indian ocean scanning th...

Time. my pledge to all the families is the same. we will do everything in our power it to keep you informed. >> we have teams of reporters covering every angle of the global hunt for flight 370. in malaysia, beijing, perth, austral australia. we want to get you the latest from the ground from perth, australia. sunday morning there, not quite light, three hours from daylight and the start of sundays search. one question for you, and this is the key. you had the satellite picture showing a big pie...

This particular area. but they didnt see anything. there was some debris spotted and when they had the military plane come out and look at it, it was first spotted by the civilian plane. they didnt see it, so they have sent a merchant ship out there to try to take a closer look to see what the debris is. but so far, they have found nothing. we are about one hour away from the first planes expected to take off. we are seeing more countries involved now, more planes taking to the air. what the aus...

Again just knowing that the seas are constantly moving things around or do they eliminate an area and move on to the next one. >> reporter: they go again and again, especially if they have an intriguing bread crumb like what the chinese sent out. the reason why if you think of the ocean, its constantly churning. the temperatures are changing, debris moving in and out. especially in this gyre, everything is circling. its very possible for debris to pop up and then sink back down. its something th...