How to reach:
To reach the tidal bench marks with a 4 wheel drive vehicle from the intersection of Highway 12 and Highway 70 near Sealevel, North Carolina, proceed southeast then east on Hwy 70 (Seashore Drive) for 7.2 km (4.5 mi) to School Drive, turn left onto School Drive and proceed northwest for 0.4 km (0.2 mi) to its intersection with Shell Road, turn right on Shell Road and proceed northeast for 1.0 km (0.6 mi) to its intersection with Core Sound Loop Road and Morris Marina Road, proceed straight onto Morris Marina road continuing NE for 1.3 km (0.8 mi) to its termination at the Morris Marina parking lot. Board the ferry and continue east 6.1 km (3.8 mi) or 45 minutes to the ferry landing area at the National Park Service Long Point cabin area on Portsmouth Island, disembark the ferry and continue southeast on sand road for 0.2 km (0.1 mi) to beach ramp number 16, turn left and proceed northeast on the beach for 12.9 km (8.0 mi) to beach ramp number 9, turn left and proceed north-northwest on sand track for 0.3 km (0.2 mi) to its termination and a cul-de-sac. The bench marks are located along the sand track and across the slough to the northwest. The tide gauge is located across the slough to the northwest.