This reported shoaling is in the notorious Hell Gate Problem Stretch where the Waterway follows the narrow, man-made canal between the Vernon and Ogeechee Rivers. See https://cruisersnet.net/167918 for a recent report by longtime cruiser, Jim Healy.
GEORGIA – AICW – BEAUFORT RIVER TO ST. SIMONS SOUND – VERNON RIVER: Shoaling
Shoaling was found between Raccoon Key Light 87 (LLNR 36265) 31-51-59.248N / 081-04-42.389W and Hell Gate Buoy 90 (LLNR 36277) 31-51-33.806N / 081-05-02.056W. Mariners are advised to exercise extreme caution while transiting the area. Chart 11507 LNM 50/17