Historical Dictionary of Naval Intelligence

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 ahead of them and safeguard the huge investments involved. Today the new challenges range from an increasingly aggressive strategy adopted by Pyongyang's submarine fleet and the exclusion of illegal