To 24 ports; the busiest crossings are to Greenwich (24 minutes, 53 times a day), Westminster (24 minutes, 50 times a day), Canary Wharf (11 minutes, 43 times a day), North Greenwich (34 minutes, 43 times a day), London Bridge (4 minutes, 42 times a day), Bankside (8 minutes, 42 times a day), Embankment (20 minutes, 42 times a day) and Battersea Power Station (39 minutes, 42 times a day).