All proceedings for the condemnation and forfeiture of a ship, or ship and equipment, or arms and munitions of war, in pursuance of this Act shall require the sanction of the Secretary of State F1or such chief executive authority as is in this Act mentioned, and shall be had in the Court of Admiralty, and not in any other court; and the Court of Admiralty shall, in addition to any power given to the court by this Act, have in respect of any ship or other matter brought before it in pursuance of this Act all powers which it has in the case of a ship or matter brought before it in the exercise of its ordinary jurisdiction.