Scale 1:144. An ozatrace copy of a plan, showing the incident board for all decks of the Tribal class frigate Zulu (1962). 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 is drawn by D. Langskaill [Draughtsman at Rosyth Dockyard flourishing 1974].