Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Douglas | GBDGS | United Kingdom | 54°09'N | 4°28'W |
| Dover | GBDVR | United Kingdom | 51°07'N | 1°17'E |
| Oakham Ness | GBOAK | United Kingdom | 51°25'N | 0°38'E |
| Falmouth | GBFAL | United Kingdom | 50°09'N | 5°04'W |
| Kirkcaldy | GBKKD | United Kingdom | 56°07'N | 3°09'W |
| Yarmouth (Uke) | GBGTY | United Kingdom | 50°40'N | 1°30'E |
| Dingle | GBDIN | United Kingdom | 53°22'N | 2°28'W |
| North Woolwich | GBWOL | United Kingdom | 51°30'N | 0°01'E |
| Eccles | GBECS | United Kingdom | 53°27'N | 2°22'W |
| Inverness | GBINV | United Kingdom | 57°29'N | 4°14'W |
| Workington | GBWOR | United Kingdom | 54°39'N | 3°34'W |
| Dartmouth | GBDTM | United Kingdom | 50°21'N | 3°34'W |
| Newhaven | GBNHV | United Kingdom | 50°47'N | 0°03'E |
| Eastham | GBEAM | United Kingdom | 53°21'N | 2°58'W |
| Inverkeithing | GBINK | United Kingdom | 56°02'N | 3°24'W |
| Woolwich | GBWOL | United Kingdom | 51°30'N | 0°01'E |
| Dagenham | GBDAG | United Kingdom | 51°27'N | 0°22'W |
| Middlesbrough | GBMID | United Kingdom | 54°35'N | 1°14'W |
| Invergordon | GBIVG | United Kingdom | 57°41'N | 4°10'W |
| Whitehaven | GBWHV | United Kingdom | 54°33'N | 3°36'W |