Plaster model of the emblematic figure of 'Navigation' on the Admiralty Arch, Whitehall, painted brown and glazed, by Sir Thomas Brock KCB, RA (1847-1922). It takes the form of a seated female classical figure, looking to viewer's right, holding a sextant vertically on her lap. It has a protective glass dome and base (marked OBJ0525.1) and is one of pair with OBJ0524 ('Gunnery'). The pair was presented to the Royal Naval Museum in the Royal Naval College, Greenwich, in March 1923 by Lady Brock, the sculptor's widow. That collection was largely transferred to the National Maritime Museum in 1936.