(CNN)Malaysia Airlines flight 370 disappeared in the early hours of March 8, 2014, less than an hour after it took off from Kuala Lumpur.
Mapping MH370: Takeoff, disappearance, searches ... and debris found
Here are maps showing what happened.
The Malaysia Airlines Boeing 777 took off at 12:41 a.m. local time, heading for Beijing in China. A total of 239 passengers and crew were on board for the flight, scheduled to take a little over six hours.
Many details and theories about the plane's route came in the hours and days after the disappearance. To start with, searches were launched on land and sea north, north-east and north-west of Kuala Lumpur. Radar transmissions and pilot communications were studied in depth:
At 1:19 a.m., one of the pilots says "Good night, Malaysian three seven zero," to air traffic controllers as the plane moves from Malaysian to Vietnamese airspace.
At 1:21 a.m., the plane's transponder, which identifies the flight to air traffic controllers, stops communicating.
Between 1:21 a.m. and 1:28 a.m. the plane appears to change course, making a sharp left turn.
At 2:15 a.m. radar tracks a plane traveling west, then making a turn either to the north or south.
Expert research, including groundbreaking analysis of satellite data pointed to the plane traveling south, over the wide open expanse of the Indian Ocean. New search areas were computed to gauge when the plane, if on autopilot, would have run out of fuel and fallen from the sky.
Searches coordinated by Australian authorities scoured the surface of the ocean west of Perth using 21 aircraft, 19 ships and underwater vehicles equipped with sonar.