Some questions affecting the operational value of shipborne radar and on which there is, at the moment, no clear unanimity of view are discussed in this paper.

The best position for the console is discussed in the light of requirements which vary with the different uses to which a shipborne radar can be put. The advantages of a chart comparison unit are also considered and the conclusion is drawn that these can be more economically gained by other methods. In particular the use of P.P.I. photographs is advocated as a method of land echo identification which leaves the chart free for other uses.