A U.S. Navy P8 Poseidon leaves Perth International Airport to begin another day searching for the Malaysia airliner jet, which went missing on March 8th.<br /> <br />There have been around 133 missions like this one, hunting for debris from Flight MH370 in a remote area of the southern Indian Ocean.<br /> <br />Not a single piece of wreckage has yet been found. But officials have concluded - based on satellite data - that it ended its flight in the sea, 1,500 kilometres west of Perth.<br /> <br />A massive international operation -- in both air and sea -- is hunting for answers about what happened to the jet and the 239 people on board.<br /> <br />Here video shows a U.S. Navy "towed pinger locator" onboard an Australian ship picking up possible transmissions from the black box recorders...but no further signals have been traced since the weekend.<br /> <br />Coordinator, Air Chief Marshal Angus Houston, said the search had to be narrowed before an underwater vehicle could look for wreckage on the sea floor.
