To 9 ports; the busiest crossings are to Friedrichshagen (30 minutes), Treptower Park (an hour), Rübezahl (35 minutes, three times a day, late March to early October), Müggelseeperle (45 minutes, twice a day, late March to early October), Schmetterlingshorst (2 hours 40 minutes, every day, late March to early October), Grünau (2 hours 50 minutes, every day, late March to early October), Erkner (an hour and a half, six times a year, mid-May to early September) and Woltersdorf (1 hour 55 minutes, six times a year, mid-May to early September).