 Yellow means use cautions, kind of a moderate, which we have all the time. And then a green flag would be pretty much a go, not so bad, very flat day that you can imagine, no activity in the area for marine lives, as well as weather. So it's like a stop sign, and you will see that in most places around the world, and it's becoming more and more popular. Presuming there are enormous waves, if someone can't swim very well, should they ever go into a sea, say over their chest, where the water might come over their chest?