Scale 1:48. An ozatrace copy of a plan showing the No. 03 [bridge top], 02 [bridge], 01 [boat deck], and 1 [upper] decks, as fitted of the Rothesay class frigate Londonderry (1958). The drawing illustrates the ventilation arrangements on these decks. This plan is noted as Sheet 1 of 2 and was modified a tPortsmouth Dockyard in March 1973.