(a) A line drawn from the easternmost tip of Folly Island to 32[deg]41[min]37[sec] N., 079[deg]53[min]03[sec] W. (abandoned lighthouse tower) on the northside of Lighthouse Inlet; thence west to the shoreline of Morris Island.
(b) A line drawn from the seaward tangent of Folly Island across Stono River to the shoreline of Sandy Point.
(c) A line drawn from the southernmost extremity of Seabrook Island 257[deg] true across the North Edisto River Entrance to the shore of Botany Bay Island.
(d) A line drawn from the microwave antenna tower on Edisto Beach charted in approximate position latitude 32[deg]28.3[min] N. longitude 80[deg]19.2[min] W. across St. Helena Sound to the abandoned lighthouse tower on Hunting Island.
(e) A line formed by the centerline of the highway bridge between Hunting Island and Fripp Island.
(f) A line drawn from the westernmost extremity of Bull Point on Capers Island to Port Royal Sound Channel Range Rear Light, latitude 32[deg]13.7[min] N., longitude 80[deg]36.0[min] W.; thence 259[deg] true to the easternmost extremity of Hilton Head at latitude 32[deg]13.0[min] N., longitude 80[deg]40.1[min] W. [USCG-2014-0410, 79 FR 58681, Sept. 30, 2014]