Please answer the following question: Sikuliaq is an American research vessel currently under construction at Marinette Marine Corporation in Marinette Wisconsin for the National Science Foundation. Expected to enter service in January 2014 the $200 million vessel will replace the 1966-built research vessel Alpha Helix that was retired in 2007. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Mean Of Transportation