RMS Titanic was a British ocean liner that sank on 15 April 1912 after striking an iceberg on the ship's maiden voyage from Southampton, England to New York City, United States. Titanic, operated by the White Star Line, was carrying passengers and mail. Of the estimated 2,224 passengers and crew aboard, approximately 1,500 died, making the incident the deadliest sinking of a single ship at the time.^[a] Titanic carried some of the wealthiest people in the world, as well as hundreds of emigrants from the British Isles, Scandinavia, and elsewhere in Europe who were seeking a new life in the United States and Canada. The disaster drew public attention, spurred major changes in maritime safety regulations, and inspired a lasting legacy in popular culture.

RMS Titanic was the largest ship afloat upon entering service and the second of three Olympic-class ocean liners built for the White Star Line. The ship was built by the Harland and Wolff shipbuilding company in Belfast. Thomas Andrews Jr., the chief naval architect of the shipyard, died in the disaster. Titanic was under the command of Captain Edward John Smith, who went down with the ship.

The first-class accommodation was designed to be the pinnacle of comfort and luxury. It included a gymnasium, swimming pool, smoking rooms, fine restaurants and cafes, a Victorian-style Turkish bath, and hundreds of opulent cabins. A high-powered radiotelegraph transmitter was available to send passenger "marconigrams" and for the ship's operational use. Titanic had advanced safety features, such as watertight compartments and remotely activated watertight doors, which contributed to the ship's reputation as "unsinkable".