SS Californian was a British Leyland Line steamship. She is thought to have been the only ship to see the Titanic, or at least her rockets, during the sinking, but despite being the closest ship in the area, the crew took no action to assist. The United States Senate inquiry and British Wreck Commissioner's inquiry into the sinking both concluded that the Californian could have saved many or all of the lives that were lost, had a prompt response been mounted to the Titanic's distress rockets. The U.S. Senate inquiry was particularly critical of the vessel's captain, Stanley Lord, calling his inaction during the disaster "reprehensible".

The Leyland Line was a British shipping transport line founded in 1873 by Frederick Richards Leyland after his apprenticeship in the firm of John Bibby, Sons & Co. After Frederick Leyland's death, the company was taken over by Sir John Ellerman in 1892. In 1902, the company was bought by the International Mercantile Marine Company and a portion of its fleet was withdrawn from service and transferred to the Ellerman Lines. The company was liquidated in 1935 after a period of declining influence due to the Great Depression.