Malaysia authorities have released a transcript of conversations between the pilots of missing flight MH370 and ground control.

The transcript does not suggest anything other than a routine start to a flight, but it does confirm that the Malaysian authorities previously released the incorrect parting words by one of the pilots to air traffic control.

The final words of one of the pilots to Kuala Lumpar's air traffic control centre was: "Good night, Malaysian three seven zero."

Previously, the Malaysian authorities said that the parting words by the co-pilot was: "All right. Good night."

The unusually colloquial phrase led to speculation that one of the pilots was potentially preparing for something other than a normal flight.

But the release of the transcript - which follows repeated criticism of the Malaysian authorities from the relatives of Chinese passengers - shows that the pilots' interactions were exactly what would be expected.

The Malaysian authorities have not explained why the account of what happened has changed.

Underwater search

Meanwhile, rescue teams looking for the missing Malaysia Airlines plane in the Indian Ocean say they may have to take the search underwater.

More than three weeks on, no wreckage from the aircraft has been found.

Planes and ships are already examining an area about the size of Ireland.

Air Chief Marshal Angus Houston is the head of the Australian team which is leading the search:

200 aircrew are continuing to scour the sea for missing flight MH370, as Malaysian and US officials hold a meeting about using specialised deep-sea search and recovery equipment.