The Ocean liner RMS Empress of Ireland sinks in the Gulf of Saint Lawrence with the loss of 1,012 lives.

RMS Empress of Ireland was a Scottish built ocean liner that sank near the mouth of the Saint Lawrence River in Canada following a collision in thick fog with the Norwegian collier Storstad in the early hours of 29 May 1914. Although the ship was equipped with watertight compartments and, in the aftermath of the Titanic disaster two years earlier, carried more than enough lifeboats for all onboard, she foundered in only fourteen minutes. Of the 1,477 people on board, 1,012 died, making it the worst peacetime marine disaster in Canadian history.Fairfield Shipbuilding and Engineering built both the Empress of Ireland and her sister ship, Empress of Britain, at Govan on the Clyde in Scotland. The liners were commissioned by Canadian Pacific Steamships or CPR for the North Atlantic route between Liverpool and Quebec City. The transcontinental CPR and its fleet of ocean liners constituted the company's self-proclaimed "World's Greatest Transportation System". Empress of Ireland had just begun her 96th voyage when she was lost.The wreck of Empress of Ireland lies in 40 m (130 ft) of water, making it accessible to advanced divers. Many artifacts from the wreckage have been retrieved, some of which are on display in the Empress of Ireland Pavilion at the Site historique maritime de la Pointe-au-Pre in Rimouski, Quebec, and at the Canadian Museum of Immigration at Pier 21 in Halifax, Nova Scotia. The Canadian government has passed legislation to protect the site.

An ocean liner is a passenger ship primarily used as a form of transportation across seas or oceans. Liners may also carry cargo or mail, and may sometimes be used for other purposes (such as for pleasure cruises or as hospital ships).Cargo vessels running to a schedule are sometimes called liners. The category does not include ferries or other vessels engaged in short-sea trading, nor dedicated cruise ships where the voyage itself, and not transportation, is the prime purpose of the trip. Nor does it include tramp steamers, even those equipped to handle limited numbers of passengers. Some shipping companies refer to themselves as "lines" and their container ships, which often operate over set routes according to established schedules, as "liners".

Ocean liners are usually strongly built with a high freeboard to withstand rough seas and adverse conditions encountered in the open ocean. Additionally, they are often designed with thicker hull plating than is found on cruise ships, and have large capacities for fuel, food and other consumables on long voyages.The first ocean liners were built in the mid-19th century. Technological innovations such as the steam engine and steel hull allowed larger and faster liners to be built, giving rise to a competition between world powers of the time, especially between the United Kingdom and Germany. Once the dominant form of travel between continents, ocean liners were rendered largely obsolete by the emergence of long-distance aircraft after World War II. Advances in automobile and railway technology also played a role. After Queen Elizabeth 2 was retired in 2008, the only ship still in service as an ocean liner is RMS Queen Mary 2.