The Reagan, which has since departed the Yokosuka base for eventual arrival at Puget Sound Naval Shipyard in Bremerton, Washington, was shown in an X post on April 4 along with the USS Blue Ridge, an amphibious command ship, and some destroyers plus images of the local coastline.

A seagoing vessel or aircraft approaching a warship of the U.S. -- or any nation, for that matter -- must identify itself or face what could be lethal consequences. Conventional spycraft take time to reach their target and can be immobilized before breaching a ship’s security.

The Navy investigated overhead social media imagery of the USS Ronald Reagan but has not concluded that a drone flew over the home of the 7th Fleet, a Yokosuka Naval Base spokesman said.