Marines heading out to sea in any of the Navy’s fleet of amphibious ships get quickly and acutely familiar with a few spaces inside those large gray warfighting hulls: their berthing space, the ship’s gym and the enlisted mess decks. There’s usually nothing spectacular about those spaces, which are often crowded and offer little in the way of physical privacy or familiar comforts of home. But aboard Makin Island, the Navy’s newest big-deck amphibious assault ship and homeported in San Diego, what would have been some storage area off the main mess decks has been remade into a cozier space…