Grand Admiral a naval rank in one of the highest in the several European navies that use this system, what system are they using?
Military rank Military ranks are a system of hierarchical relationships in armed forces, police, intelligence agencies or other institutions organized along military lines. Usually, uniforms denote the bearer's rank by particular insignia affixed to the uniforms. Ranking systems have been known for most of military history to be advantageous for military operations, in particular with regards to logistics, command, and coordination; as time went on and military operations became larger and more complex, military ranks increased and ranking systems themselves became more complex.
Naval Striking and Support Forces NATO Naval Striking and Support Forces NATO (STRIKFORNATO) is the principal naval service command of the Allied Command Operations for the North Atlantic Treaty Organization, replacing Naval Striking and Support Forces Southern Europe (STRIKFORSOUTH). STRIKFORNATO is commanded by Commander United States Sixth Fleet, and it is the only command capable of leading an expanded maritime task force.