War on the Rocks – Few expressions in the maritime lexicon today are as persistent and pervasive as maritime domain awareness. The term has become a watchword in security and governance debates, a conceptual idiom implying information superiority in the nautical arena. Within the greater scope of maritime domain awareness, however, underwater domain awareness is a new and emerging concept that has piqued the interest of maritime analysts. It rests on the idea that modern-day technology has rendered the sea transparent, making it possible for maritime agencies to track undersea activity.