| Survey name | Type | Altitude | Spacing | Flight line distance |
|---|---|---|---|---|
| Beaufort | M/R-D | 121.9 m | 9.60 km | 1,184 km |
| South-central N. C. East | M-D | 152.4 m above ground | 1.60 km | 3,218 km |
| Southeast North Carolina | M-Dz | 152.4 m above ground | 1.60 km | 24,671 km |
| Offshore East Coast | M-D | 457.2 m (barometer) | 8.00 km | 59,545 km |
| Offshore E. Coast Tie Lines | M-D | 300 m (barometer) | -9999.00 km | 185,000 km |