The hunt for objects that could be from the missing Malaysia Airlines plane has entered a third day in the southern Indian Ocean.
Saturday's search will involve six aircraft and cover 13,900 square miles (36,000 square kilometres) of ocean south west of Perth in western Australia.
Flight MH370 disappeared on its way from Kuala Lumpur to Beijing two weeks ago with 239 people on board, the majority of them from China.
Three Royal Australian Air Force P3 Orion aircraft, a New Zealand P3 RAAF Orion aircraft and two ultra long-range commercial jets with 10 volunteer observers on board make up the search team.
The jets and the P3 Orion left Perth at 9am local time (10pm UK time) and will take four hours to reach the search area.
The vast distance only allows the Orions two hours of search time before they must head back to Perth. The jets will be able to stay for five hours.
Two merchant ships are currently in the area, and are due to be joined by the Royal Australian Navy ship HMAS Success later on Saturday afternoon.
Two Chinese aircraft are expected to arrive in Perth on Saturday, followed by two Japanese planes on Sunday.
A flotilla of Chinese ships is making its way to the southern Indian Ocean, although it is still several days away.
Potential pieces of debris from the Boeing 777 were spotted by satellite last Sunday, but were only revealed on Thursday after analysis.
One object is thought to be 24 metres in length and the other about five metres.
The sightings have been deemed credible by the authorities and a "potentially important development" in attempts to solve the mystery surrounding the flight's fate.
However, Australia's deputy prime minister Warren Truss has admitted the objects could have sunk by now.
Poor weather hampered the first day of the search on Thursday, but conditions are expected to be good on Saturday.
The planes are expected to fly low under cloud cover rather than rely on radar, a repeat of the procedure followed on Friday.
The US is considering a request from Malaysia for underwater surveillance equipment to help in the search.
The Pentagon says it has spent $2.5m (£1.5m) providing ships and aircraft for the search, and has budgeted for a further $1.5m (£900,000).
Numerous theories about the fate of the plane have been put forward since its disappearance, and a former air accident investigator told Sky News on Friday he believed a "criminal act" was to blame.
Former assistant director of the FBI in New York James Kallstrom, who investigated the explosion of a Boeing 747 in the Atlantic Ocean in 1996, said the main focus of the inquiry should be on the crew.