Admiral

An admiral is a senior naval officer rank, usually associated with command of fleets or high-level leadership in a navy. Its exact grades and authority vary among naval services.

Military rank: A formal position in a military hierarchy that establishes authority, responsibility, and precedence. Admiral is a senior rank within this broader system.
Admiral of the Fleet: A top naval rank used in some countries, often above admiral and sometimes chiefly ceremonial. This is a higher grade than ordinary admiral in several naval systems.
Admiralty: A governmental or naval authority responsible for the administration and direction of a navy. Admiralties institutionalized senior naval leadership in several states.
Chief of Naval Operations: The senior uniformed officer of the United States Navy and a member of the Joint Chiefs of Staff. This is a prominent national leadership post held by an admiral.
Commodore: A naval rank or appointment below admiral in many services, with meaning varying by country. It is often the next lower grade or an intermediate command title.
Navy: A military service organized to conduct operations at sea and, in some countries, on inland waters. Admiral is a naval rank, not a universal military grade.
Vice admiral: A senior naval rank commonly placed below admiral and above rear admiral. It is one of the grades in the admiralty hierarchy.
Medieval naval warfare: Naval combat and maritime military practice in the European Middle Ages. European admiral titles and offices developed from earlier medieval sea commands.
First Sea Lord: The professional head of the United Kingdom's Royal Navy and its principal naval adviser to government. The office illustrates an admiral's role in service-wide leadership.
Captain (naval): A senior commissioned naval rank generally below flag-officer grades. A captain commands ships but does not ordinarily hold admiral rank.

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