List of fleets and major commands of the Royal Navy

Formations of the Royal Navy
amphibious forces battle forces escort groups line of battle task forces task groups squadrons and flotillas
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The professional head of the Royal Navy is known as the First Sea Lord and Chief of the Naval Staff (1SL/CNS).

There are presently two senior subordinates to the 1SL: the Second Sea Lord, who is also the Deputy Chief of the Naval Staff; and the Fleet Commander.