A novel radar situation display

The difficulty of manual plotting in a multi-ship situation has led to the search for an automatic plotting method. Earlier schemes failed for various known reasons. A combination of the Kelvin Hughes `Photoplot¿ display and the Thorn image retaining panel marked a new approach, which led to this successful television display. The characteristics of the image retaining panel and the way it is utilized in the equipment are described. Photographs of situations at sea as displayed by the equipment demonstrate most of the advantages of this presentation.