List of units of the United States Navy

The list is organized along administrative chains of command (CoC), and does not include the CNO's office or shore establishments.

Operational CoCs change quite often based on a unit's location and current mission.

For example, USS Roosevelt is always administratively assigned to Commander, Naval Air Force, Atlantic Fleet (CNAL).

Before 2010, later in the IDRC, it would have been assigned to Commander, Second Fleet, which is responsible for Carrier Strike Group (CSG) training and operations on the east coast.

Once the CSG deploys and crosses over the inter-UCC boundary in the mid-Atlantic, it then reports (is "chopped") to the Sixth Fleet (responsible for European waters and the Mediterranean Sea).