Second Engineer (Второй механик) / Third Engineer (Третий механик)

Second Engineer, Third Engineer

4th Engineer, Junior engineer, 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, Third Engineer

Second Engineer, Second engineer officer on ships powered by main propulsion machinery of 3000 kW propulsion power or more, Second engineer officer on ships powered by main propulsion machinery of between 750 kW and 3,000 kW propulsion power