Scale 1:192. A ozatrace copy of a plan showing No. 4 [middle], 5 [lower], 6 [platforms] and 7 [hold] 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 2 of 2 and was drawn by J. T. Smith [Draughtsman at Chatham Dockyard flourishing 1966].