subject to subsections (c) and (d) of section 8014 of this title, prepare for such employment of the Navy, and for such recruiting, organizing, supplying, equipping (including those aspects of research and development assigned by the Secretary of the Navy), training, servicing, mobilizing, demobilizing, administering, and maintaining of the Navy, as will assist in the execution of any power, duty, or function of the Secretary or the Chief of Naval Operations;

investigate and report upon the efficiency of the Navy and its preparation to support military operations by combatant commands;

prepare detailed instructions for the execution of approved plans and supervise the execution of those plans and instructions;

as directed by the Secretary or the Chief of Naval Operations, coordinate the action of organizations of the Navy; and

perform such other duties, not otherwise assigned by law, as may be prescribed by the Secretary.