Titanic

The RMS Titanic, or simply Titanic, was the largest transatlantic liner of its time. It made its maiden voyage from Southampton to New York City. It sank on April 15, 1912 after colliding with an iceberg.

History
Initially, the Titanic had no known connections to the supernatural. However, its fate was temporarily altered by an angel Balthazar.

Salvation
The Titanic was saved by Balthazar under orders from Castiel. This was to secure them souls to help them combat Raphael during the civil war in Heaven.

This led to the survival of people that were supposed to die, as well as the birth of their descendants. The alteration of events also led to Ellen Harvelle being wed to Bobby Singer, with Jo as their daughter, as well as the Winchesters owning a Mustang instead of the Impala.

This angered Atropos, who was willing to let the planned future go but was determined to keep the past the way it was supposed to be. She began to kill the survivors from the ocean liner. The angels attempted to kill her, but after a stalemate, Castiel was forced to order Balthazar to correct the flow of events by sinking the Titanic again.