Factual error: The lake that Jack told Rose he went ice fishing on when she was threatening to jump is Lake Wissota, a man-made lake in Wisconsin near Chippewa Falls (where Jack grew up). The lake was only filled with water in 1918 when a power company built a dam on the Chippewa River, six years after the Titanic sank.
Factual error: Rose mentions Austrian psychoanalyst Sigmund Freud's ideas on the male preoccupation with size to Bruce. However this is 1912, and Freud did not publish the work relating to this until 1920 in "Beyond The Pleasure Principle." Also, up until 1919, Freud relied solely on data from females.
Trivia: Gloria Stuart (old Rose) and Kate Winslet (young Rose) were the first two actresses to be nominated for an Oscar for playing the same character in the same movie. Kate Winslet did it again in 2001, when she was nominated Best Supporting Actress for Iris, as she played Young Iris Murdoch, while Judi Dench played Old Iris.
Lewis Bodine: We never found anything on Jack. There's no record of him at all.
Rose Calvert: No, there wouldn't be, would there? And I've never spoken of him until now. Not to anyone, not even your grandfather. A woman's heart is a deep ocean of secrets. But now you know there was a man named Jack Dawson. And that he saved me. In every way that a person can be saved. I don't even have a picture of him. He exists now, only in my memory.