The four possible flight paths of missing Malaysian flight MH370 have been revealed as experts claim to know its final location.
In March 2014, MH370 was flying 239 people from Kuala Lumpur to Beijing when it vanished and crashed into the sea.
Reports show that the flight made a U-turn less than an hour after takeoff, disappearing from radar somewhere over a remote part of the Indian Ocean before plunging into the sea.
But mystery still surrounds the events of the flight, with little light being shed on why this tragedy happened.
Families of some of the lost passengers claim that the crash was a mass murder -suicide by pilot Zaharie Ahmad Shah, but this theory remains unproven.
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Here are the four possible flight paths of Malaysian flight MH370
1. The official flight path of MH370 meant that the plane should have taken off from Kuala Lumpur airport at 12.41am Malaysia time, travel towards Beijing.
Instead, less than an hour later, the flight made its final contact with Air Traffic Control before disappearing.
The Malaysian authorities insist they had no contact from 38 minutes after take-off.
2. British aerospace expert Richard Godfrey Richard believes the pilot was being followed, evidenced by some unusual 360 degree turns in the aircraft’s journey.
These imply that Zaharie was changing course deliberately and in full control of the plane, rather than it be operating automatically.
Richard told 60 Minutes on Sunday: "Everyone has assumed up until now there was a straight path, perhaps even on autopilot. I believe there was an active pilot for the whole flight."
He discovered that after being in the air for three hours the aircraft was put into a holding pattern, typically used when awaiting clearance from air controllers, for around 20 minutes.
Richard said: “He may have been communicating with the Malaysian government, he may have been checking whether he was being followed.
“He may have simply wanted time to make up his mind where he would go from here. I hope that if there was any contact with Malaysian authorities that after eight years now they’d be willing to divulge that.”
He thinks the plane is in the ocean 1933km west of Perth, under 4,000m of water.
3. Florence de Changy, author of The Disappearing Act, gives a more radical hypothesis.
De Changy suggests that flight MH370 was shot down by a missile at around 2.45am in north Vietnam, still on its original flight path towards Beijing.
She believes the flight could have been shot down by a “fighter jet, missile or a new laser-guided weapon system being tested in the region at the time," and claims the flight did not make a U-turn.
Were this true, it might have left the pilots with time to send some jumbled transmissions but not enough time to clearly relay the information.
4. The fourth projected flight path suggests that, again, MH370 made a u-turn partway into its journey.
However, rather than crashing near Australia, it predicts that the flight turned again whilst over the Indian Ocean, and travelled up towards India.
This is based on a 'handshake ping' at 08:11MYT, which is similar to when a phone just rings but is never picked up.
A satellite continued to identify the plane once an hour for four to five hours after it disappeared from radar.
However experts say that the southern route is more likely, as travelling towards India would involve passing through a busy airspace and the chances of going undetected would be very small.
Up until now no wreckage has been found, despite a $200-million search of a 120,000 square metre area.
Debris has been discovered on the French island of Reunion, on the coasts of Tanzania and Mozambique and on the shores of Madagascar.
