The search for AirAsia QZ8510, which crashed into the Java Sea on Sunday, is set to move underwater with the arrival of specialist equipment.
A French crash investigation team will use sensitive acoustic detection devices to try locate the plane's "black box" flight recorder, the BBC reported.
The Airbus A320-200 was flying from Surabaya in Indonesia to Singapore with 162 people on board when it vanished.
No survivors have been found and the cause of the crash remains unknown.
So far only 10 bodies have been found and brought ashore, with the search operation repeatedly held up by bad weather and rough seas.
One person has been identified as passenger Hayati Lutfiah Hamid - her funeral was held in Surabaya on Thursday.
The plane is almost certainly at the bottom of the Java Sea - several pieces of debris have been recovered but despite a massive five-day search the fuselage is still missing.
Officials say most of the passengers could still be inside.
The BBC's Karishma Vaswani in Jakarta said the hope was that the French-led team would have better luck than existing searchers in locating the "pings" emitted by the so-called black box.
This would help them locate the plane and, once retrieved, try to find answers as to what happened to it.
The head of Indonesia's search and rescue agency, Bambang Soelistyo, said on Friday that wreckage and bodies were spread over a 5km area of the Java Sea off Borneo.
The search was now focussing on an area of 1575 nautical square miles, he told reporters.
"Divers are already on standby at the navy ship Banda Aceh to dive on that priority area to locate the body of the plane," he said. "I hope we'll get a significant result today."