books.google.com - Naval intelligence is one of the most vital, and sometimes decisive, forms of intelligence. Over the centuries, and with particular velocity over recent decades, the techniques of detecting and destroying military (and commercial) shipping have improved, leapfrogging the equally frantic race to keep...http://books.google.com/books/about/Historical_Dictionary_of_Naval_Intellige.html?id=OyC69ij3AQIC&utm_source=gb-gplus-shareHistorical Dictionary of Naval Intelligence
