4th Engineer (Четвертый механик) / Motorman (Моторист) / Oiler (Квалифицированный моторист) / Rating forming part of a watch in a manned engine-room or designated to perform duties in a periodically unmanned engine-room (Вахтенный моторист) / Ratings as able seafarer engine in a manned engine-room or designated to perform duties in a periodically unmanned engine-room (Моторист первого класса)