700.1056—Command of a ship.
        
        (a) 
         The officer detailed to command a commissioned ship shall be an officer of the line in the Navy eligible for command at sea.
    
    
        
        (b) 
         The officer detailed to command an aircraft carrier, an aircraft tender, or a ship with a primary task of operating or supporting aircraft shall be an officer of the line in the navy, eligible for command at sea, designated as a naval aviator or naval flight officer.