Right at the start of the film, they have a big launching ceremony where they smack a bottle on the bow of the Titanic. Unfortunately, this never happened. In fact, it was White Star Line policy not to christen any of their ships at all, as they deemed it as bad luck. (bummer)

A bit of nit-picking as well. After that scene where we see the opening credits, we are watching a number of views of the Titanic being launched (like in a Pathe news reel.) Unfortunately, these scenes are actually the launching of the Queen Mary and Queen Elizabeth roughly 25 years after the Titanic's sinking (double bummer.)