Wittenburg, Germany: We're sitting in the MS River Allegro tied up alongside in Wittenburg on the Elbe. I love the river ships/boats/whatever. I could spend the whole summer living on the rivers of Europe in these craft.
This one holds two buses full of people, those on the Rhine normally hold three buses full, the Elbe is a smaller river. Why "buses?" Well when it's necessary to take us somewhere too far to walk, they trot out buses and sizing ships to buses makes sense.
Oddly I shared that fact with a Program Director (guide) and she hadn't figured it out. Program Directors get hired based on being bilingual, not on being rocket scientists.