I was thrilled to see that you actually could use the sails on the Marquis in the pre release screenshots. However, the only Marquises I've found so far all have had their sails down. I've tried every button combination there is, but I can't seem to get the sail up. In screenshots and some YouTube videos the sail is up and running, but I can never seem to get it up in my game. Tried searching a bit around the net but found nothing. Some claim it's a PS3 issue however?
In this video the sails are used, but I cannot figure out how to. http://www.youtube.com/watch?v=BMr9iXGEW1c