The search for Malaysia Airlines flight 370 is taking place in the logical area, but adjustments could be made including bringing in private contractors and more underwater search vehicles, Australian ambassador to the US Kim Beazley said.
Mr Beazley, in a TV interview in the US, said as flagged by Prime Minister Tony Abbott, if the plane is not found in the Indian Ocean by mid-week searchers would stop, regroup and reconsider.
"The air search might be adjusted," Mr Beazley told CNN's Sunday morning political program, State of the Union with Candy Crowley.
"But, when you say you are going to reconsider all things, obviously that is one of the things you're going to consider.
"You may well also consider bringing in other underwater search equipment.
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"All of these sorts of things will be on the table if nothing is found in the next few days."
Mr Beazley said the pings heard in the Indian Ocean off Western Australia pointed to the missing Boeing 777's location.
"It was a set of pings that were picked up over a long period of time - a couple of hours," he said.
"There is nothing there that it could be other than that sort of recorder.
"So, there's no other planes gone down in the area so logic has driven them to this spot."
Mr Beazley said Australia remained committed to searching for the plane.
"The thing that the Australian government has said from the outset, they'll keep going on this," he said.
The plane vanished en route to Beijing from Kuala Lumpur on March 8 with 239 people on board.
