The underwater search started with a bathymetry survey, which continued as required throughout the underwater search and mapped a total of 710,000 sq km of Indian Ocean seafloor, the largest ever single hydrographic survey.
The missing Malaysia Airlines aircraft was lost during its flight from Kuala Lumpur in Malaysia to Beijing, China.
It is believed to have been side-tracked thousands of kilometres off course out over the southern Indian Ocean before breaking down on the coast of Western Australia.
Now, three years on, Australian investigators have delivered their final verdict one of the biggest aviation mysteries in history.
"The aircraft was not configured for a ditching at the end-of-flight", notes the report.
"Whether or not the loss of MH370 was the result of deliberate action by one or more individuals, or the result of a series of unforeseen events or technical failures", it reads, "it is nearly inconceivable and certainly societally unacceptable in this modern aviation age with 10 million passengers boarding commercial aircraft every day, for a large commercial aircraft to be lost and for the families of those on board not to know with certainty what became of the aircraft nor those on board".
It acknowledged that it was "almost inconceivable and certainly societally unacceptable", in an era where 10 million passengers fly daily, for a large commercial aircraft to be missing. "We are deeply sorry that we could not locate plane or 239 souls aboard", says report, which covers a total of 440 pages.
Official understanding of MH370's location-where it was and where it wasn't-"is better now than it has ever been", the report said.
The search team also looked back at satellite imagery which showed objects in the ocean that may have been MH370 debris.
In the General area where the wreckage of the aircraft had an estimated 25,000 square kilometres.
Data from the plane's location was limited because no transmissions were received from the aircraft after the initial 40 minutes of flight.
"The underwater search has eliminated most of the high probability areas yielded by reconstructing the aircraft's flight path and the debris drift studies conducted in the past 12 months have identified the most likely area with increasing precision", it said.
"Steps are being taken to advance other aircraft systems including emergency locator transponders and flight recorder locator beacons", the report said.
The report points out that Malaysia is the state responsible for the ICAO investigation of MH370, but as a participant in the investigation, ATSB can make safety recommendations.
'This was an unprecedented endeavour and there has been an extraordinary response from the global community, ' he said in a statement.