Revealing mistake: This mistake, as far as I know, can only be seen in widescreen. After Rose, Jack, Tommy & Fabrizio have run on deck (after breaking the gate down), the camera looks down the ship toward the bow. If you look at this carefully, you can see city lights in the top-left hand corner of the picture. I know these are city lights because in a book about the movie, it shows a similar picture.
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