Mapping and Site Characterization in Zero Visibility
The purpose of this presentation is to share the ways in which computer-generated graphics were an aid to wreck site visualization for the C.S.S. Georgia. The Georgia lies in the totally black water of the Savannah River where a combination of strong currents and a 6-ft tide fall limits the work time for divers to brief periods at slack and high tide. During the spring there is only an hour each day of acceptable diving conditions. To further complicate the picture, indications were that dredging had scattered the wreckage over a broad area of the channel and a salvage attempt in 1868 involving the use of dynamite had destroyed an undetermined portion of the superstructure. An extensive search of archival sources failed to produce a set of ship’s plans, but six sources gave her length and beam — each different, varying from 150 to 260 ft in length and 40 to 60 ft of beam (Garrison and Lowery, 1980).
KeywordsMain Channel Site Characterization Tone Contour Back Channel Wreck Site
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