The name "Null Island" is used to refer to the point on the Earth's surface at zero degrees latitude and zero degrees longitude ( ), i.e., where the prime meridian and the equator intersect. Null Island is located in international waters in the Atlantic Ocean, roughly 600 km off the coast of West Africa, in the Gulf of Guinea. The exact point, using the WGS84 datum, is marked by the Soul buoy (named after the musical genre), a permanently-moored weather buoy.
"Null Island" jokingly refers to the suppositional existence of an island at that location, and to a common cartographic placeholder name to which coordinates erroneously set to 0,0 are assigned in placename databases in order to more easily find and fix them. The nearest land (570 km (354 mi; 307.8 nmi) to the north – a small Ghanaian islet offshore from Achowa Point between Akwidaa and Dixcove. The depth of the seabed beneath the Soul buoy is around 4,940 metres (16,210 ft).) is