A Singaporean navy ship located the main body of the AirAsia planet hat crashed into The Java Sea on December, 2014. The discovery of the fuselage is the latest boost in a slow-moving search operation hampered by bad weather. It followed the recovery of both the plane;s black boxes, which contain vital information to determine what caused the crash. The flight data recorder holds a wealth of information about every major part of the plane, with details such as the jet's speed and the direction it was heading in, while the cockpit voice recorder stores radio transmissions and sounds in the cockpit.