Oscar-winning actress Kate Winslet is apparently back in the water in a big way in the upcoming Avatar sequels. While Winslet first broke out with films like Heavenly Creatures, it was James Cameron’s mega-hit Titanic that catapulted her to superstardom—but making the iconic historical epic was no cake walk. Given the sheer amount of water necessary to shoot Titanic, and the amount of time actors Winslet and Leonardo DiCaprio had to spend in said water, there have been many stories recounted over the years of just how arduous an experience it was getting all of those …