Actually, it's both. I was introduced to the Bateaux Mouches pattern by someone at knit night. I love that the scarf is lightweight and can be scrunched up and kept in a handbag to take out when it gets chilly.
It can be worn as a scarf and it's also large enough to wear as a shawl. Knitting the pattern was ridiculously easy. Cast on a certain number of stitches and then knit with a one stitch increase at the beginning of every row. It's a great project for knit night since it's just rows and rows of garter stitch.