To 23 ports; the busiest crossings are to Waren (3 hours), Serui (4½ hours), Manokwari (8 hours, eight times a month), Jayapura (16 hours), Numfor (10 hours, once a week), Oransbari (25 hours, once a week), Roon (34 hours, once a week) and Windesi (37 hours, once a week).