Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Inverkeithing | GBINK | United Kingdom | 56°02'N | 3°24'W |
| Woolwich | GBWOL | United Kingdom | 51°30'N | 0°01'E |
| Antioch | USATI | United States of America | 38°01'N | 121°49'W |
| Bourne | USBOR | United States of America | 41°50'N | 66°14'W |
| Tampa | USTPA | United States of America | 27°57'N | 82°28'W |
| Port Neches | USPTN | United States of America | 30°00'N | 93°57'W |
| Saugerties | USSUG | United States of America | 42°06'N | 73°54'W |
| Whittier | CAWHT | United States of America | 60°47'N | 148°40'W |
| Boston | USBOS | United States of America | 42°21'N | 71°05'W |
| Port Tampa | USPTA | United States of America | 27°52'N | 82°28'W |
| Port Isabel | USPIS | United States of America | 26°05'N | 97°13'W |
| Riverhead | USRID | United States of America | 40°59'N | 72°39'W |
| West Foreland | USWFO | United States of America | 60°43'N | 151°44'W |
| Baltimore | USBAL | United States of America | 39°17'N | 76°35'W |
| Port St. Joe | USPSJ | United States of America | 29°49'N | 85°19'W |
| Port Arthur (Usa) | USPAR | United States of America | 29°53'N | 93°57'W |
| Rensselaer | USRSR | United States of America | 42°39'N | 73°44'W |
| Valdez | USVDZ | United States of America | 61°05'N | 146°24'W |
| Yarmouth (Usa) | USYAR | United States of America | 43°48'N | 70°12'W |
| Port Mantee | USPMT | United States of America | 27°30'N | 82°33'W |