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It is flowing downwards, rather than if you have looking at nigeria or in peru, where these currents are moving upwards. these two currents are going together and flowing down along the west australian coastline. we're talking -- that's more part of the african/asian monsoonal rate to be able to better predict ocean currents, where they are going, how they affect the climate, temperature of those upper boundary currents of the ocean. so, it's a very complex structure over there. that's why there is -- and unfortunately, such an understudied region. >> eric raes, thank you so much for helping u...

By an australian ship. an american underwater drone now being called in to assist with this search in waters, john berman, that are 2.8 miles deep. >> yeah, not a lot of people have been to this part of the ocean. >> wow. >> it's very, very remote, about 1,000 miles off the coast of perth, australia. this is where the analysts now believe that flight 370 may have ended. and as i said, the conditions there are simply treacherous. >> our next guest knows this region well. eric rays is an oceanographer with the ocean institute of western australia and joins us live via skype from perth. we're so ...