To 11 ports; the busiest crossings are to Rübezahl (15 minutes, seven times a day, late March to early October), Müggelseeperle (20 minutes, seven times a day, late March to early October), Müggelhort (20 minutes, six times a day, late March to early October), Neu-Helgoland (25 minutes, four times a day, late March to early October), Treptower Park (an hour and a half), Schmetterlingshorst (2 hours 10 minutes, every day, late March to early October), Grünau (2 hours 20 minutes, every day, late March to early October) and Köpenick (30 minutes, six times a year, mid-May to early September).