Please answer the following question: SS Empire Simba was a British steam-powered cargo ship. She was originally an American ship launched in 1918 as SS West Cohas. During a stint in the United States Navy from 1918 to 1919 she was called USS West Cohas (ID-3253).West Cohas was built in 1918 for the United States Shipping Board (USSB) as part of the West boats a series of steel-hulled cargo ships built on the West Coast of the United States for the World War I war effort. 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