RFA Fort Rosalie (A186) was an armament stores carrier of the Royal Fleet Auxiliary.

She took part in Operation Grapple, the thermonuclear weapon test at Christmas Island in 1957.

Many of the surviving 166 ships passed to the United States Maritime Commission.

Fort ships had a triple expansion steam engine and a single screw propeller.

This article about a specific naval auxiliary ship or boat of the United Kingdom is a stub.