Scale: 1:48. Plan showing the upper deck and lower deck for Seahorse (1748), a modified 1745 Establishment 24-gun Sixth Rate, as ordered to be fitted at Deptford Dockyard. A copy of this plan was sent to Deptford on 18 June 1770.

NMM, Progress Book, volume 2, folio 397 states that 'Seahorse' was surveyed afloat at Deptford Dockyard in January 1770 and was found to need between Small and Middling Repairs. She was docked at Deptford Dockyard on 29 April 1770 and the copper removed. Seahorse was undocked on 2 March 1771 having undergone Middling Repairs.