MH370: Most complex aviation search

Two vessels and 12 aircraft are searching the southern Indian Ocean for traces of the wreckage.

Two vessels and 12 aircraft are searching the southern Indian Ocean for traces of the wreckage. Picture: AFP.

PERTH - The search for Malaysia Flight MH370 is now one of recovery as 12 aircrafts and two vessels continue to scour parts of the southern Indian Ocean today.

Australian Prime Minister Tony Abbott says the operation will go on until there's no hope of finding anything from the Boeing 777, which vanished 18 days ago with 239 people on board, on its way to Beijing from Kuala Lumpur.

The search for the missing MH370 resumed off the west Australian coast this morning after being hampered by some fairly severe weather in the southern Indian Ocean on Tuesday.

Search planes set out at first light this morning from the Pearce Air Base.

The families of those on board are expected to begin arriving in Perth over the coming days, to be closer to the search effort.

No wreckage has been found as yet.

The recovery of the plane's black box is critical to explaining exactly what happened on board the flight and search teams have less than two weeks until the black box stops admitting a locator signal.

This recovery effort has been described as the most complex international effort in aviation history.

It may be years before the wreckage is found.

Meanwhile, some of the families of passengers have begun a multimillion dollar litigation process against Malaysian Airlines and Boeing in the United States.