Please see Fleet Admiral for other nations which use this rank
Fleet Admiral (Russian: Адмирал флoта, Admiral flota), sometimes also referred to as Admiral of the Fleet, is presently the highest naval rank of the Russian Federation. It's a direct counterpart of corresponding Soviet naval rank, Admiral of the Fleet. A Fleet Admiral is a generic term for a senior admiral in command of a large group of ships, comprising a Fleet or, in some cases, a group of Fleets. ... Admiral of the Fleet is a supreme naval position that has existed both in historical navies and several modern day navies of the 21st century. ...
The Russian rank of Fleet Admiral could be considered the equivalent to a five star Admiral in other nations. There are no ranks higher than Fleet Admiral in the active Russian military, although some United States armed forces sources state that a higher rank, Fleet Admiral of the Russian Federation may exist in the event of a national emergency or during times of war. Admiral is a word from the Arabic term Amir-al-bahr (Lord of the bay). ... The armed forces of the United States of America consist of the United States Army United States Navy United States Air Force United States Marine Corps United States Coast Guard Note: The United States Coast Guard has both military and law enforcement functions. ... A Fleet Admiral in the modern Russian Navy is the highest Russian naval rank. ...