The Australian Joint Agency Coordination Centre (JACC) said more than 70,000 sq km of the southern Indian Ocean floor have been scoured in the search for Malaysia Airlines Flight MH370 which vanished last year.

In a statement today, the agency said the targeted search area was 120,000 sq km.

On the underwater search, it said the Fugro Discovery ship arrived at the search area yesterday, while the Fugro Equator vessel was on its way to Freemantle harbour, Australia for re-supply.

"Weather continues to impact on the search operations but conditions are expected to be improved over the coming months," added JACC.

Flight MH370 went off the radar on March 8, last year as it flew from Kuala Lumpur to Beijing with 227 passengers and 12 crew on board.

The final flight path of the Boeing 777 aircraft was believed to have ended in the southern Indian Ocean after veering off course.