it's the currents. it's what's taken those objects, maybe 100, maybe 200 miles away from where they originated. there's also this convergence of plastic, called a gire, a lot of rubbish in the water which makes it difficult to distinguish in some areas just what is what. these enormous challenges still facing the search crews. as you say, time is ticking away. >> all right. andrew stevens reporting live from australia. as andrew said, we need help. so malaysia is tweeting for help, i should say. minister hish mudun hussein is tweeting for high tech microphones. we'll speak with the u.s. secretary of defense tonight to further request specialist assets. they're asking for a hydrophone. the transducer conducts sound