Line, named after its owner James Onedin. Around this, it depicts the lives of his family, most notably his brother and partner Robert and his sister Elizabeth, giving insight into the lifestyle and customs at the time, not only at sea, but also ashore (mostly lower- and upper-middle-class). The series also illustrates some of the changes in business and shipping, such as from wooden to steel ships and from sailing ships to steamships. It shows the role that ships played in such matters as international politics, uprisings and the slave trade.