Where fifteen or more women or girls unaccompanied by a responsible person are carried as emigrants on board an emigrant vessel a properly qualified woman who has no other duty to fulfil on board shall be appointed to give such emigrants any material or moral assistance of which they may stand in need without in any way encroaching upon the authority of the master of the vessel. She shall report to the authority making the appointment and her report shall be available for the use of the Governments which may be concerned.