Here's a breakdown:
* 15 degrees north: This latitude line runs through the middle of the Gulf of Guinea.
* 0 degrees east: This is the prime meridian, which runs through Greenwich, England. It divides the Earth into the Eastern and Western hemispheres.
Therefore, the exact location of 15 degrees north, 0 degrees east is within the Gulf of Guinea and is closer to the coast of Gabon than any other country.