Officer in charge of an engineering watch in a manned engine-room or as designated duty engineer in a periodically unmanned engine-room on ships powered by main propulsion machinery of 750 kW propulsion power or more (Вахтенный механик морского судна с ГДУ 750 кВт и более) / Second engineer officer on ships powered by main propulsion machinery of 3000 kW propulsion power or more (Второй механик морского судна с ГДУ 3000 кВт и более) / Second engineer officer on ships powered by main propulsion machinery of between 750 kW and 3,000 kW propulsion power (Второй механик морского судна с ГДУ от 750 до 3000 кВт) / Third Engineer (Третий механик)