PENGAWASAN OLEH DINAS PERHUBUNGAN PROVINSI RIAU TERHADAP OPERASIONALISASI PELABUHAN PENYEBRANGAN RO-RO DI KOTA DUMAI TAHUN 2012-2013 Problems that occur on Ro-Ro ferry ports of Dumai ie lack warships in the harbor, so that every day many crossings that can not take across in because the capac...