One of the most controversial and complex theories was put forward by Robin Gardiner in his book, Titanic: The Ship That Never Sank? In it, Gardiner draws on several events and coincidences that occurred in the months, days, and hours leading up to the sinking of the Titanic, and concludes that the ship that sank was in fact Titanic's sister ship Olympic, disguised as Titanic, as an insurance scam.
Olympic was the older sister of Titanic, built alongside the more famous vessel but launched in October 1910. Her exterior profile was nearly identical to Titanic, save for small detailing such as...