Scale: 1:48. Plan showing the body plan with stern board decoration, sheer lines with inboard detail and figurehead, and longitudinal half-breadth for building Seahorse (1748), a modified 1745 Establishment 24-gun Sixth Rate, at Harwich by Mr Barnard. Note the sweep ports for 34 oars. Also note the date 1747 is the Old Style calendar when New Year in England began on 25 March of each year until 1752. Therefore this plan is actually from 1748. A copy of this plan was sent to Mr Barnard on 23 February 1748, the same day that the ship's keel was laid down.

Signed Jacob E. Acworth [Surveyor of the Navy, 1715-1749].

NMM, Progress Book, volume 2, folio 397, states that there was an Admiralty Order dated 23 August 1748 to name the new ship 'Seahorse'. 'Seahorse' was begun on 23 February 1748 at Harwich by Mr John Barnard. She was launched on 13 September 1748, and sailed on 6 October having cost £4,063.10s.0d. 'Seahorse' was fitted at Sheerness Dockyard between 10 October 1748 and February 1749.