Perilous voyages of small watercraft at sea , amphibious landings on well defended beachheads , Clipper ships whaling on distant oceans , military vessels in armed conflict , night of relentless cannon fire , explosive reflections across shark infested waters , treasure maps and chest laden with gold , rubies and pieces of eight , the cry of Viking warriors on the rugged coast of Newfoundland .. Pirates just off the shores of the Carolinas ..  Forts Pulaski , Sumter and Jefferson on the Dry Tortugas ..
Oil platforms racked by ferocious winds on the Gulf of Mexico ..
Union and Confederate battles on Mobile Bay , Riverboats traversing the Mississippi ..Tending barges along the Ohio ..On high alert through Georgia's intracoastal waterways ....