Georgia's short coast takes three sections, and the two at the ends are shared with the neighbouring states. The Savannah River line at 33 CFR 80.715 runs from the southernmost tank on Hilton Head Island, South Carolina, by way of Bloody Point Range Rear Light, to Tybee Light — so a Savannah trip's demarcation is drawn partly from a South Carolina landmark. Between Tybee and St. Simons (80.717) and from St. Simons to Amelia Island, Florida (80.720), lines close the sounds, which leaves the whole Georgia sound-and-marsh system as Inland Rules water. The exam-relevant point for a Brunswick or St. Simons operator is that the shift to the International Rules happens seaward of the sound entrances, not at the beach.
COLREGS Demarcation Lines covering Georgia — 33 CFR Part 80
- 33 CFR 80.715Savannah Riverline drawn — Inland water inside
- 33 CFR 80.717Tybee Island, GA to St. Simons Island, GAline drawn — Inland water inside
- 33 CFR 80.720St. Simons Island, GA to Amelia Island, FLline drawn — Inland water inside
This decides which rulebook you steer by, not where your credential may operate: the route limit is the 46 CFR Part 7 Boundary Line, and the two lines are not drawn in the same place. How the two lines differ · International Rules · Inland Rules
33 CFR Part 80 and the Part 83 definitions above read from eCFR on 12 Aug 2026. Any specific water is a determination for the cognizant Coast Guard Officer in Charge, Marine Inspection.