The nostalgia I am talking about is cultural nostalgia. Culturally, I think there is this longing (towards the ocean). A longing to be swallowed by it. The ocean suggests a (possible) disappearance of the human being(s) into it. You see people going into it , far out into it, + you don’t know if and when they are going to come out. You get the sense that you are going in to an environment that makes you vulnerable.