Ten military planes, three civil jets and 11 ships join Saturday's search for missing Malaysia Airlines flight MH370 in the southern Indian Ocean west of Perth in Western Australia, according to the Perth-based Joint Agency Coordination Center (JACC).

The Australian Maritime Safety Authority has determined a search area of about 217,000 square kilometres, 1700 kilometres north west of Perth.

The weather forecast for Saturday's search is fair, with possible showers in the search area.

The Australian Transport Safety Bureau continues to refine the area where the aircraft entered the water based on continuing ground-breaking and multi-disciplinary technical analysis of satellite communication and aircraft performance, passed from the international air crash investigative team comprising analysts from Malaysia, the United States, the UK, China and Australia.