
I'm guessing the owner of the boat liked music and, in particular, Mozart's The Magic Flute, in which Papageno was a major character. Just check out the music and staff on the fin of the little contraption in the upper left hand corner of the above photo:

digression: One of our favourite piano duets when my sister and I were young was "Papageno's Song".





:-)
Zauberflöte has my favorite aria in it, too. I just wish I had the pipes to pull off the Queen of the Night. These days, with my hayfever, I'm better off trying to sing the part of Soraster... but I don't think they'd cast me, in all my girlish figure.