An underwater search for footballer Emiliano Sala's plane will take place after cushions were found on a beach.
They were discovered near Surtainville on France's Cotentin Peninsula, on Monday, by French authorities.
Following this, the Air Accidents Investigation Branch (AAIB) has identified an area of four square nautical miles for a search.
The plane disappeared with Sala, 28, and pilot David Ibbotson, from Crowle, North Lincolnshire, on board last week.
Due to weather and sea conditions, an underwater search is not expected to start until the end of the week and will take up to three days, an AAIB spokesman said.
Unverified photographs of cushions, taken on Wednesday, were captured by a woman taking a walk on the beach near Surtainville.
Investigators believe the two seat cushions pictured came from the aircraft.
The AAIB will now use sonar equipment to locate any wreckage on the sea bed.
A spokesman said French safety authorities found the two seat cushions, which preliminary examinations suggested were likely from the missing aircraft.
Following this, detailed assessments of the flight path and last known radar position were carried out, which identified the search area.
Through the Ministry of Defence's salvage and marine operations team, a special survey vessel has now been commissioned to look for wreckage.
If it is found, a remotely operated vehicle will be sent down to examine it.
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Emiliano Sala's family view search area off Guernsey
Argentinian Sala signed for Cardiff City and was travelling from Nantes, where he previously played, when the flight was lost over the English channel.
An official search for it was called off with Guernsey officials saying there was little chance those on board survived, however, more than £290,000 was raised for a private search to continue.