| Location | Value |
| Gough Island | 26mm |
| eSikhawini | 9mm |
| Empangeni | 8mm |
| Richards Bay | 7mm |
| Sundumbili | 6mm |
| Durban/Virginia | 6mm |
| Stanger | 5mm |
| Tristan Da Cunha | 5mm |
| Cape Saint Lucia | 4mm |
| St. Lucia Estuary | 4mm |
| Location | Value |
| Gough Island | 4mm |
| Marion Island | 1mm |
| Location | Value |
| Marion Island | 12mm |
| Location | Value |
| Location | Value |