What ocean does the prime meridian cross the equator?

The 'prime meridian' crosses the equator on the 'Atlantic Ocean'.

Explanation:

The point where the Prime Meridian and the Equator intersect each other is the confluence of coordinates 0° longitude and the 0° latitude. This point of confluence lies on the 'Atlantic Ocean', and to be more specific, it lies right on the 'Gulf of Guinea'. The closest point on land from the intersection of the Prime Meridian and the Equator is situated on the western coast of the African continent in a country named Gabon.

Dlive among other english speakers

D.haka is the first answer and a.canberra is the second answer