Blue and Yellow are sailing on a leg of the course to a leeward mark on port tack.
Blue has an outstanding penalty. She luffs, passes head to wind, and bears away to
a close-hauled course on starboard tack. Yellow changes course to avoid a collision
before Blue achieves a course that is more than ninety degrees from the true wind.
Blue continues to bear away and achieves a course that is more than ninety degrees
from the true wind. Both boats display flag Y. What should the call be?