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

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)

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

OS, Junior officer, Officer on watch (OOW), Second Officer, Third Officer

AB Seaman, OS, Third Officer