Timeline of the search for MH370 – a visual guide

Clouds hover outside the window of an aircraft on a mission to find the missing Malaysia Airlines flight MH370, off Tho Chu island Photograph: KHAM/REUTERS

Since the disappearance of Malaysia Airlines flight MH370 in 2014, countless hours have been spent scouring vast swathes of the Indian Ocean to locate the wreckage, using search aircraft and surface vessels equipped with the latest technology.

The three official investigations launched by Malaysia and Australia, piecing together evidence from as far away as Mozambique, have so far failed to prove conclusively what happened to the missing flight.