4th Engineer (Четвертый механик) / Motorman (Моторист) / Third Engineer (Третий механик)

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

Motorman, Ratings as able seafarer engine in a manned engine-room or designated to perform duties in a periodically unmanned engine-room

Third Engineer, 4th Engineer