Scale 1:48. Plan showing the body plan, sheer lines with midship framing and longitudinal half breadth for Alarm (cancelled 1826), a 28-gun Sixth Rate Sloop at Deptford. Alterations, per Admiralty Order of 23rd November 1829 to the body and sheer plan also relate to Imogene (1831) [ex Pearl while building], Conway (1832) and Alarm (cancelled 1832), but not to Tyne (1826) as she had already been launched. Signed R.Seppings (Surveyor of the Navy) Annotation at top: "July 1828 The Alterations in the Dimensions and Half-Breadth as hereshown and the Quarter Galleries agreeably to the Sketch sent in Feb 1827 are to be conformed to R.S"