Information: - James McHenry (November 16, 1753 May 3, 1816) was an Irish-born American military surgeon and statesman. McHenry was a signer of the United States Constitution from Maryland and the namesake of Fort McHenry. He was a delegate to the Continental Congress from Maryland, and the third United States Secretary of War (17961800), under the first and second presidents, George Washington (administration: 17891797) and John Adams (administration: 17971801). - James Vincent Forrestal (February 15, 1892 May 22, 1949) was the last Cabinet-level United States Secretary of the Navy and the first United States Secretary of Defense. - The National Security Act of 1947 was a major restructuring of the United States government's military and intelligence agencies following World War II. The majority of the provisions of the Act took effect on September 18, 1947, the day after the Senate confirmed James Forrestal as the first Secretary of Defense. - The United States Department of the Navy ( DoN ) was established by an Act of Congress on April 30 , 1798 ( initiated by the recommendation of James McHenry ) , to provide a government organizational structure to the United States Navy , the United States Marine Corps ( from 1834 onward ) and , when directed by the President ( or Congress during time of war ) , the United States Coast Guard , as a service within the Navy , though each remain independent service branches . The Department of the Navy was an Executive Department and the Secretary of the Navy was a member of the President 's cabinet until 1949 , when amendments to the National Security Act of 1947 changed the name of the National Military Establishment to the Department of Defense and made it an Executive Department . The Department of the Navy then became , along with the Department of the Army and Department of the Air Force , a Military Department within the Department of Defense : subject to the authority , direction and control of the Secretary of Defense . What is the relationship between 'united states department of the navy' and 'united states secretary of the navy'?
The answer to this question is:
office held by head of the organisation