Sound Methods: The Necessity of High-resolution Geophysical Data for Planning Deepwater Archaeological Projects

The availability of deepwater survey technology allows researchers to work more readily in waters beyond conventional diving limits and makes possible an increased number of historical shipwreck projects. Several deepwater historical wreck sites are being investigated, some are being archaeologically mapped, and a few are even being excavated. Conducting a deepwater archaeological project to acceptable archaeological standards requires extensive and complex pre-investigation planning; otherwise, valuable data could be lost, as well as expensive ship and sub time wasted. High-resolution geophysical survey data must be a part of this planning process. Utilization of this type of data gives the planning scientists a better overall understanding of the site, which is essential in formulating valid field methodology. Drawing on examples from actual deepwater projects, this article discusses why high-resolution geophysical data is essential to the planning process, the means and methods used to collect the data, and how this data is integrated into the planning process to produce a feasible field project plan.