Third Engineer (Третий механик) / Third Officer (Третий помощник)

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, Third Engineer

Chief Officer, Chief mate on ships of 3,000 gross tonnage or more, Chief mate on ships of between 500 and 3,000 gross tonnage, Officer on watch (OOW), Officer in charge of a navigational watch on ships of 500 gross tonnage or more, Officer in charge of a navigational watch on ships of less than 500 gross tonnage, engaged on near-coastal voyages, Security officer, Second Officer, Third Officer, 4th Officer, Boatmaster of a pleasure craft, Boatmaster of a small craft used for commercial purposes, Junior officer