The evening before at about 6 PM or so, the empty ore train "V5" began its 652-klometer long journey from Nouadhibou on the Atlantic coast to the ore mines around Zouérate. The about 2 kilometer long train has now, at 09.36 AM, covered about 2/3 of its way and is between Ben Amira and Choum near PK 404. Pulling are SDL40-2 CC # 114, SD70ACS CC # 125 and SDL40-2 CC # 109 in multiple control. Above the train, travelling at about 50 km/h, there is a cloud of diesel exhaust, awhirl finest sand and remains of ore powder from the cars visible.