How to reach:
To reach the tidal bench marks from I-95, take exit 8 for US Highway 278 East to Hilton Head Island, proceed east on US Highway 278 and cross over the bridge to Hilton Head Island and continue east on Highway 278 (William Hilton Parkway) for 5.8 km (3.6 mi) to the entrance of Hilton Head Plantation, turn left (north) at the traffic light, go around the circle and continue to the guard gate, then continue north for 3.9 km (2.8 mi), turn right (east) on Sea Brook Drive and go 0.2 km (0.1 mi) and bear left at the stop sign, then continue on Whooping Crane Way for 1.8 km (1.1 mi) to the bridge entering Ribaut Island, then proceed straight through to Charlesfort Place and then 0.5 km (0.3 mi) to the residence at No. 7 Charlesfort Place. The bench marks are located in the vicinity of Charlesfort Place and Ribaut Drive. The tide gage and staff were located on a private pier behind No. 7 Charlesfort Place.