When beginning a new save on raft, you are greeted with two things, an expansive ocean, and three bars in the bottom left of your screen. For now, we will focus on the bars. There is a health bar, a food bar, and a hydration bar. They are all simple to understand. One measures your hunger, one measures your hydration, and the other your health. Also, if you happen to go underwater, a fourth bar will appear at the top of your screen denoting your oxygen left.