4th Officer (Четвертый помощник) / Junior officer (Младший офицер) / Officer on watch (OOW) (Вахтенный помощник капитана) / Third Officer (Третий помощник)

Officer in charge of a navigational watch on ships of 500 gross tonnage or more, Officer on watch (OOW), Second Officer, Third Officer

4th Officer, Junior officer, Officer on watch (OOW), Third Officer

Chief mate on ships of 3,000 gross tonnage or more, Chief Officer, Officer in charge of a navigational watch on ships of 500 gross tonnage or more, Officer on watch (OOW)