We were just watching #Delos on #plumbing. They show the problems common on boats with #toilets blocking, flooding, & smelling. Then they show their very expensive solutions to make them serviceable, reliable, & reduced chance of problems. Very sophisticated.
However, there is an alternative approach. Instead of more expense, complexity and space the other option to avoid all the problems is so simple (and better environmentally) is #composting toilets.
Plus they also work in boatyards.