This area of shallow water is at the south end of the Estherville Minim Creek Canal which begins at the Waterway’s exit southward from Winyah Bay.
SOUTH CAROLINA – AICW – MYRTLE GROVE SOUND AND CAPE FEAR RIVER TO CASINO CREEK – WINYAH BAY – CHARLESTON HARBOR: Depth of Channel.
The U.S. Coast Guard has found at low-tide depths of less than 5ft of water in the middle of the channel between Winyah Bay-Charleston Harbor Channel Light 4 (LLNR 34120 [33°11.7192N / 079°16.3300W, 33.195320 / -79.272167]) and Winyah Bay-Charleston Harbor Daybeacon 5 (LLNR 34125 [33°11.4410N / 079°16.5012W, 33.190683 / -79.275020]). Mariners are advised to use caution while transiting the area. Chart 11532, 11534 LNM 35/16