RMS Transvaal Castle was a British ocean liner built by John Brown & Company at Clydebank for the Union-Castle Line for their mail service between Southampton and Durban. In 1966 she was sold to the South Africa-based Safmarine and renamed S.A. Vaal for further service on the same route. Following cessation of the service between the UK and South Africa in 1977 the ship was sold to Carnival Cruise Lines and rebuilt in Japan as the cruise ship SS Festivale, re-entering service in 1978.