Hulks
Hulks were a kind of floating prisons. Old and worn out warships were converted into floating prisons, after their masts and guns were stripped. They were anchored in rivers and estuaries, especially on the River Thames, and the River Medway. In Pip's time, Britain's prisons were overcrowded. Many convicts were kept on these prisons while waiting to be transported to colonies such as Australia or before being assigned to hard labour. Pip sees the black hulk lying in the marshes and it creates an atmosphere of fear and punishment. The hulk symbolises crime and punishment; the British penal system; and the overcrowding of British prisons. The use of hulks was common in Britain from the late 18th century to mid-nineteenth century. Conditions aboard them were notoriously overcrowded, unsanitary, and brutal.