. . "Indication of existence of metal mass in the vicinity of the location, susceptible of perturbating the reading of balises by the on-board system."@en . _:vb14990 . "stable" . "Big Metal Mass"@en . "2024-01-08"^^ . "2023-03-14"^^ . _:vb15235 _:vb14990 . _:vb15234 . _:vb15235 . _:vb14990 . _:vb15234 _:vb15235 . _:vb15234 . "1.2.1.1.1.18" . "1.1.1.3.2.18" . .