A method for assisting in the locating of a first aircraft includes a step of emission by the first aircraft of an identifier and of a time-stamped position reading, said method further including: the reception and the storage by at least one second aircraft of the identifier and of the time-stamped position reading, and the downloading by the second aircraft, after its landing, of the identifiers and of the time-stamped position readings to a database on the ground, and, in case of disappearance of the first aircraft, the determination of the last known position of the first aircraft based on the time-stamped position readings stored in the database on the ground.