Here Comes The Sun
To James Cameron’s defense, he did try his best to ensure everything seemed realistic in terms of the ship’s route. But since we know the real path of the Titanic, we can also tell exactly when he got it wrong. During the famous deck-spitting scene (did we really need that, by the way?), Jack and Rose are spitting over the deck during sundown, just before dinner.
As they’re on the port side of the ship, it means it’s traveling north-west, when in real life the ship was traveling south-west. We know it’s a small thing to be petty about, but a mistake nonetheless.