Scale 1:48. Plan shows the sheer lines longitudinal half breadth, half plan, body plan and sections for the Aetna class floating batteries Trusty (1855), Glatton (1855), Meteor (1855), Thunder (1855) and Aetna (1855). The drawing bears the signature of Sam Read [Master Shipwright of Sheerness Dockyard 1848-1859]. The title of the drawing is "Glatton floating battery sheer draught as taken off at this yard". The plan is torn and is in need of conservation.