It is named in a 1963 British atlas, but a 1972 article states "what British maps call the Western Approaches, and what the oil industry calls the Celtic Sea certainly the residents on the western coast don't refer to it as such."
É nomeado nun atlas británico de 1963, pero un artigo de 1972 afirma que "o que os mapas británicos chaman Southwest Approaches e que a industria do petróleo chama Mar Celta sen dúbida os veciños da costa occidental de Gran Bretaña non se refiren a eles como tal."