To 21 ports; the busiest crossings are to Köpenick (an hour), Friedrichshagen (an hour and a half), Rübezahl (1 hour 35 minutes, three times a day, late March to early October), Müggelseeperle (1 hour 45 minutes, twice a day, late March to early October), Jannowitzbrücke (an hour and a half), Haus Zenner (20 minutes, eight times a week, May to August), Spreepark (35 minutes, eight times a week, May to August) and Schmetterlingshorst (3 hours 40 minutes, every day, late March to early October).