Please answer the following question: William and Kate Johnston was a Barnett class lifeboat stationed at New Brighton in the English county of Merseyside from the summer of 1923 until 1950. The lifeboat was designed as a prototype by James R. Barnett who was a consulting naval architect to the Royal National Lifeboat Institution. She was the first Barnett class lifeboat and at the time of her launch she was the largest lifeboat in the world. 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