Scale 1:1. Plan shows the incident board for all decks on the Rothesay class frigate Yarmouth (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. This drawing was revised at Rosyth Dockyard in 1975 and was originally drawn by C. Rice [Draughtsman at Portsmouth Dockyard flourishing 1965].