A French Navy D'Estienne d'Orves-class aviso ship, the Enseigne de vaisseau Jacoubet, equipped with sonar able to detect the underwater "pings" emitted by the ULBs of the flight recorders, arrived at the possible crash site on 23 May. The French ship can deploy an ROV that can dive up to 1000 meters and that is able to detect signals from ULBs but with limited depth range.