For readers unfamiliar with the technology of midcentury direction finding to locate the source of radio emissions, the chapter on technology is quite good and is totally devoid of mathematics. It thus allows the reader to fully appreciate the process without experiencing the pain of the theory.

I found myself referring frequently to my old copy of The Pulse of Radar by Sir Robert Watson-Watt on many occasions as I read this book and the two volumes complement each other nicely. Watson-Watt is a far more entertaining writer but that does not detract from the value of this book in any way. It is another excellent publication from the Naval Institute Press.