Sitmar Cruises and its predecessor Sitmar Line were company names derived from the acronym for the Societa Italiana Trasporti Marittimi (English: Italian Maritime Transport Company). SITMAR originally was an Italian shipping line founded by Russian émigré , however the company's headquarters were later transferred to Monaco. Vlasov initially operated cargo services from 1937, gradually replacing these with passenger services from 1947 until 1988, when SITMAR was sold to the Peninsular and Oriental Steam Navigation Company (P&O). After the sale, most of the former SITMAR ships were transferred to the fleet of P&O subsidiary Princess Cruises, while one, TSS Fairstar, became the sole vessel of the newly created P&O-Sitmar Cruises (later P&O Holidays). As of July 2018, one briefly named former