To 10 ports; the busiest crossings are to Olbia (7½ hours, twice a day in season), Barcelona (20 hours, six times a week in season), Termini Imerese (14¼ hours, five times a week), Cagliari (15 hours, three times a week), Arbatax (9 hours, twice a week), Tunis (18½ hours, twice a week), Porto Torres (8 hours, once a week) and Palermo (12¾ hours, once a week).