RMS Amazon was a transatlantic Royal Mail Ship that the Royal Mail Steam Packet Company operated on scheduled services between Southampton and South American ports including Buenos Aires. She was the second of the RMSP's fleet of "A" series liners, and was launched in 1906.

RMS Asturias was a Royal Mail Steam Packet Company ocean liner that was built in Ireland in 1908 and scrapped in Japan in 1933. She was a Royal Mail Ship until 1914, when on the eve of the First World War the British Admiralty requisitioned her as a hospital ship.