Arc Surveying & Mapping, Inc. and Sonographics, Inc. have a twenty year relationship that combines expert hydrographic surveyors with expert side-scan, sub-bottom and magnetometer surveyors.  Arc Surveying & Mapping, Inc. and Sonographics, Inc. have worked together on projects throughout North and South America, including the Caribbean, providing  comprehensive studies of the seafloor for the Army Corps of Engineers, the US Navy, the Department of Transportation, most dredging companies and major engineering firms.