The mystery of flight MH370: will a new search find the missing airliner after more than a decade?

The launch of a Hugin underwater robot. It can search at depths of 6,000 metres, collecting data with echo sounders, cameras, lasers and sonar to map the seabed. Photograph: Kongsberg

More than a decade after Malaysia Airlines flight MH370 went missing after veering thousands of miles off course, its location remains unknown.

The Malaysian government has promised to pay a private company, Ocean Infinity, $70m (£56m) to search for the plane on a “no find, no fee” basis.