The crashed remains from the Malaysia Airlines Flight MH370 could be as much as 500km further north than the current search area, say scientists in Italy.
Their assessment is based on the location of confirmed debris items and computer modelling that incorporates ocean and weather data.
They say this has allowed them to determine where the plane most likely hit the water and where future aircraft fragments might wash up.
The MH370 search will soon be halted.
The Malaysia Airlines flight disappeared in March 2014, en route from Malaysia's capital Kuala Lumpur to Beijing in China, with 239 passengers and crew on board.
Authorities have agreed that "in the absence of new credible evidence" the effort to find the plane on the ocean floor west of Australia will be suspended once a zone covering 120,000 square km has been fully surveyed, foreign media reports.