The launch of the 74-gun warship HMS 'Alexander' at Deptford Dockyard. The 'Alexander' can be seen on the stocks in the background. There are a number of barges and smaller vessels, full of spectators, watching her launch. In the foreground, several Royal Navy vessels are moored off the dockyard, including the 'Royal Caroline' on the far left. The 'Alexander' later served at the Battle of the Nile in 1798. In the painting the festive celebrations are emphasized through the inclusion of flags and pennants and the representation of crowds of spectators on the quayside and in boats the water. With its low horizon the work recalls Dutch 17th-century marine painting.

Like his father, John Cleveley the Younger depicted the Royal Dockyards at Deptford, Woolwich and Chatham and in many works the son followed his father’s example in producing paintings commemorating launches. However, the artist abandoned his father’s stiff, documentary style in favour of a more open, atmospheric view. John Cleveley the Younger and his brother Robert, who also worked as an artist, treated a much wider range of subjects and addressed a wider audience through making pictures for reproduction in prints.