Some boring trivia: The previous piano piece I wrote was "Anita" (also viewable on YouTube) in 1967. Following this I wrote 10 bars or so for another piece which was never completed. Over the years, I tried to work on this without any success. When I came to write Navire over 30 years later, I completed the first and end part without any problems. But there was a middle section missing. I took this earlier-composed fragment and made it the middle part (it was even in the right key). This worked out well, even though this middle part has no thematic connection with the rest of the piece at all. See bars 19-28 on the sheet music (via link above).