Spain Square in Marin and Carlos I Gate Galicia Spain. The Escuela Naval Militar de Oficiales (ENM) at Marin, Pontevedra, in north-western Spain, is the Spanish institution in charge of training the Spanish Navy’s officer class, as well as other naval personnel. It has been established here since 1943, when it was moved from its previous location at San Carlos near San Fernando, Cadiz. Virtually all Spanish naval officers are trained here.