At 23:40 on Sunday 14 April 1912 - 100 years ago - the Titanic was just a few days into its maiden voyage when a lookout delivered the fateful message: "Iceberg, right ahead."

Moments later, the passenger liner struck the iceberg, tearing a series of holes in its hull. Within three hours, the ship would be resting at the bottom of the Atlantic Ocean, at a cost of 1,517 lives.

Note: Artist's impression not to scale. Bow and stern lie approximately 600m apart on the seabed.