To help you find the port for your ferry, here are the addresses of the GNV ports:
Port of Algiers: Terminal 1 Alger, Rue d'Angkor, El Djazair 16000, Algeria
Port of Almeria: Muelle De Ribera Poniente S/N
Port of Barcelona: Ferry Terminal Barcellona Muelle San Beltrán S/N - 08039 Barcellona. Tel: +34934437139
Port of Béjaïa: Gare Maritime de Bejaia, 06 000, Bejaia, Algeria
Port of Civitavecchia: Terminal Autostrade del Mare, Molo 20. Tel: +39076659631
Port of Genoa (vehicle passengers): Varco Albertazzi, 3, 16149 Genova GE, Italy
Port of Genoa (foot passengers): Piazzale Traghetti Iqbal Masih,5. Tel: +390102094777
Port of Ibiza: estacion Maritima Provisional - Muelle de botafoch - 07800 Ibiza
Port of Naples: Piazzale Immacolatella. Tel.+390812523011
Port of Palermo: Calata Marinai D'italia. Tel: +3909160726162
Port of Porto Torres: Industrial Porto. Tel: +39079516034
Port of Nador: Navifret S.A. route du port, B.P. 91 62050 Beni-Enzar by Nador. Tel: +212536608618 /+212536608697
Port of Palma de Mallorca: Estacion Maritima n2 - Muelle de Pelaires - 07015 Palma
Port of Termini Imerese: Via Molo Riva. Tel: +39091 60726199
Port of Tangier Med: Tanger Med Zone Franche de Ksar el Majaz, Oued R'mel, BP80, Tanger. Ticket Office: Gare Maritime GM03 Maritime Station. Tel : +212539330613
Port of Tunis : Port Offices La Goulette
Port of Sète: Orsetti Maritime Station. Tel : +33467433530
Port of Valencia: Muelle Perfecto Palacio, puerto de Valencia, 46024 Valencia