Please answer the following question: Kommuna-class salvage vessel - Kommuna is a submarine salvage ship in service with the Russian Navy's Black Sea Fleet. A double-hulled catamaran she was laid down at the Putilov Factory (now the Kirov Factory) in St. Peterburg in November 1912 as the Volkhov launched the following year and commissioned on 14 June 1915. She was renamed the Kommuna on 31 December 1922. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Mean Of Transportation