Scale 1:48. Plan shows the longitudinal and transverse midship sections for the various ironclads designed by the Royal Navy in the 1860s. The ships represented on the plan are the Warrior class broadside ironclads Warrior (1860) and Black Prince (1861), the Minotaur class broadside ironclads Agincourt (1865), Minotaur (1863) and Northumberland (1866), the Royal Oak class wooden broadside ironclad Royal Oak (1860), the Royal Alfred class wooden central battery ironclad Royal Alfred (1864), The Prince Consort class wooden broadside ironclads Prince Consort (1862), Caledonia (1862) and Ocean (1863), the Achilles class broadside ironclad Achilles (1863), the Hector class broadside ironclads Hector (1862) and Valiant (1863) and the Defence class broadside ironclads Defence (1861) and Resistance (1861). The ships are represented in different colours on the drawing according to their dimensions. The words "Admiralty Cole 1862, Comparative profiles and section" are written on the reverse of the drawing. The plan has been mounted on paper.