If any Seaman or Apprentice is imprisoned in any Part of Her Majesty's Dominions on the Ground of his having neglected or refused to join any Ship in which he is engaged to serve, or of having deserted or otherwise absented himself therefrom without Leave, or of his having committed any other Breach of Discipline, and if during such Imprisonment, and before his Engagement is at an end, his Services are required on board his Ship, any Justice may, at the Request of the Master or of the Owner or his Agent, cause such Seaman or Apprentice to be conveyed on board his said Ship for the Purpose of proceeding on the Voyage, or to be delivered to the Master or any Mate of the Ship, or the Owner or his Agent, to be by them so conveyed, notwithstanding that the Termination of the Period for which he was Sentenced to Imprisonment has not arrived.