Sea Sick is a magazine story.
James is going to haul goods trains on the Mainland, but he has to get there by sea. A huge ship takes James to the Mainland, but the rough waves make an uncomfortable ride for James. Once on the Mainland, James helps out hauling goods trains. After his brief spell on the Mainland, James goes by ship again to the Island of Sodor. Despite having a rough trip by sea, James is glad that he did not get sea sick.