1. Looks Were Important:
In the early 1900s, the number of funnels on a liner became symbolic of speed and safety. Prior to Titanic, several four-stacker ships had been produced. Most notable perhaps were Cunard’s Lusitania and Mauretania, which were the fastest and largest ships afloat in their day. Since these had four funnels, the owners of Titanic and Olympic wanted their liners to have four funnels too. However, from a technical point of view, only three funnels were required on Titanic and Olympic. So they decided to add a forth, dummy funnel.