290 km directly north of Alexandria puts the debris location about 25 km within the Greek FIS, with the boundary running on about a 283° heading at that point. So if the wreck is exactly 290 km north of Alexandria, it is in Greek territory, if it is a bit further west, closer to the LKP, it is within the Cairo FIS. So if Greece wants to get involved in the investigation, they probably have a right to sit at the table.