HMS Grafton (H89) was a G-class destroyer built for the Royal Navy during the mid-1930s. During the Spanish Civil War of 19361939 the ship spent considerable time in Spanish waters enforcing the non-intervention measures agreed by Britain and France. After the beginning of World War II she was transferred from the Mediterranean Fleet to Great Britain for escort and contraband inspection duties. 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