Scale 1:192. A ozatrace copy of a plan showing No. 01, 02 and 03 [superstructure] decks, No. 1 [forecastle] , 2 [upper] and 3 [main] decks, as fitted modernisation drawing for the depot ship Forth (1938). The drawing illustrates the N.B.C. [nuclear, biological and chemical] arrangements on these decks. The plan is noted as Sheet 1 of 2 and was drawn by J. T. Smith [Draughtsman at Chatham Dockyard flourishing 1966].