the job. as you know yesterday s mission was aborted after six hours. today s dive is expected to go around the clock. there are new developments on that front, new developments, as well, with that oily substance recovered from the ocean surface and we ll also tell you about a tracking system for planes that s being rolled out over the next six years that may have changed everything about that happened to flight 370. the question is why six years from now will it be rolled out? what is taking so long. first michael holmes in perth on today s search efforts. what s the latest, michael? reporter: anderson, good morning from perth. the bluefin-21 down doing its work at the moment. by our calculations it is almost exactly halfway through the ocean floor segment of that. as we know, it takes two hours to get down and 16 hours on the bottom and two hours to get up and then they download the data. also, planes and ships out there again today. we had been told that that phase of things looki