Admiral of the fleet

An admiral of the fleet or fleet admiral (equivalent rank to admiral of the navy or grand admiral) is a military naval officer of the highest rank. In many nations the rank is reserved for wartime or ceremonial appointments. It is usually a rank above admiral (which is now usually the highest rank in peacetime for officers in active service), and is often held by the most senior admiral of an entire naval service.

It is also 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. If actually a rank, its name can vary depending on the country. In addition to "fleet admiral" and "admiral of the fleet", such rank names include "admiral of the navy" and "grand admiral".[note 1]

It ranks above vice admiral, rear admiral and usually full admiral, and is usually given to a senior admiral commanding multiple fleets as opposed to just one fleet. It is often classified in NATO nations as a five-star rank.[citation needed]

Admiral of the fleet is equivalent to an army field marshal. It is also equivalent to a marshal of the air force which in many countries has a similar rank insignia to admiral of the fleet.