Null Island is a name for the point on the Earth’s surface where the prime meridian and the equator cross, located in international waters in the Gulf of Guinea (Atlantic Ocean) off the west African coast. In the WGS84 datum, this is at zero degrees latitude and longitude (0°N 0°E), and is the location of a buoy.
The name ‘Null Island’ serves as both a joke based around the suppositional existence of an island there and as a name to which coordinates erroneously set to 0,0 are assigned in placenames databases in order to more easily find and fix them. The nearest land is a small islet offshore of Achowa Point, Ghana, between Akwidaa and Dixcove at 4°45′30″N 1°58′33″W, 307.8 nmi (354.2 mi; 570.0 km) to the north. The seabed depth at this place is around 4,940 metres (16,210 ft).
There is a moored weather and sea observation buoy at 0.000 N 0.000 E (0°0’0”N 0°0’0”W). This buoy (“Station 13010 - Soul”) is part of the PIRATA system operated jointly by the United States, France, and Brazil.