Scale 1:48. Plan showing the framing profile (disposition) proposed (and approved) for 'Impregnable' (1810), a 90-gun Second Rate, three-decker. The plan includes alterations from September 1805, and an additional fly dated 15 July 1805 concerning the scarfing of frames. The fly specifically records the starboard quarter area just forward of the galleries between the quarterdeck and lower deck gunports.