With the wind from right behind, the mainsail is on one side and the jib is on the other side of the ship. In dutch this is called sailing with a Melkmeisje, or in english with a Milkmaid.
What you see here is more like a double milkmaid, because next to the jib is also the yankee. This generates an even better airstream for more forward speed. Important in the races, of course.
- Sony NEX-6