Captain general of the Navy (Spanish: Capitán general de la Armada) is a five-star naval officer rank and the highest rank of the Spanish Navy (Armada Española). The five-star NATO rank code is OF-10, the routine honorary appointments formally ceased in 1999. The rank of captain general of the Navy is equivalent to an admiral of the fleet in many nations such as the United Kingdom or the United States, a captain general of the Spanish Army (Ejército de Tierra Español) or an Air captain general in the Spanish Air and Space Force (Ejército del Aire y del Espacio).