Scale 1:144 for the longitudinal measurements and 1:192 for the vertical measurements. This mix of scales result in a distorted diagramatical view of the decks. Plan shows the incident board for all decks for the Rothesay class frigate Berwick (1959). This panel would be on the wall and would light up if an incident (such as fire, flooding or a injury) was reported in a specific location on board. A Harland & Wolff builder's stamp dated 4 September 1961 is printed on the drawing.