Seconding the second spin cycle! We have a small room/cupboard (maybe 4 feet by 3 feet) where we hang our wet clothes, either on hangers over spring-rails, or on drying racks arranged inside. In the summer, we leave the porthole open and everything dries in a day or two on its own. In winter, we close the porthole and turn on the dehumidifier in there instead. Because it's a small room, the clothes are dry in under a day (sometimes overnight), and it means we don't have laundry hanging everywhere in our day-to-day living areas. The dehumidifier uses a negligible amount of electricity (way less than a tumble dryer), and we can transport it to other areas of the boat when needed, too.
I'm in central London, and we're actually not allowed to hang ANY laundry outside, as it violates our planning permission or something. I guess the multimillion pound flat dwellers think we look like "floating gypsies" or something if we have laundry out (their words, not mine!).