Latitudes and Longitudes
| Seaport Name | Seaport Code | Country | Latitude | Longitude |
|---|---|---|---|---|
| Gravesend | GBGVS | United Kingdom | 51°25'N | 0°24'E |
| Lyness | GBLYS | United Kingdom | 58°50'N | 3°11'W |
| Londonderry | GBLDY | United Kingdom | 54°59'N | 7°19'W |
| Port Sunlight | GBPSU | United Kingdom | 53°21'N | 2°59'W |
| Gosport | GBGOS | United Kingdom | 50°48'N | 1°07'W |
| Loch Striven | GBLHS | United Kingdom | 55°57'N | 5°05'W |
| Larne | GBLAR | United Kingdom | 54°51'N | 5°47'W |
| Port Slade | GBPTS | United Kingdom | 50°50'N | 0°15'W |
| Garston | GBGTN | United Kingdom | 53°21'N | 2°54'W |
| Loch Ewe | GBLHE | United Kingdom | 57°50'N | 5°36'W |
| Dundrum Bay | GBDUB | United Kingdom | 54°16'N | 5°51'W |
| Poole | GBPOO | United Kingdom | 50°43'N | 1°59'W |
| Fowey | GBFOY | United Kingdom | 50°20'N | 4°39'W |
| Lerwick | GBLER | United Kingdom | 60°09'N | 1°08'W |
| Belfast | GBBEL | United Kingdom | 54°36'N | 5°56'W |
| Plymouth | GBPLY | United Kingdom | 50°22'N | 4°09'W |
| Folkestone | GBFOL | United Kingdom | 51°05'N | 1°10'E |
| Leith | GBLEI | United Kingdom | 55°59'N | 3°10'W |
| Point Of Ayre | GBPTA | United Kingdom | 54°25'N | 4°22'W |
| Penzance | GBPEN | United Kingdom | 50°07'N | 5°32'W |