Details.
A 60-minute sightseeing cruise along the River Spree, showing Berlin highlights including the Reichstag, Friedrichstraße, Humboldt Forum, Museum Island, Berlin Cathedral, the TV Tower, Nikolaiviertel, Berlin Central Station and the Victory Column. Tickets are available on site, card payment is accepted, drinks and snacks are available on board, and dogs are welcome. The page states that the summer season runs from April to October and the winter season from November to December.