Officer in charge of a navigational watch on ships of 500 gross tonnage or more (Вахтенный помощник капитана морского судна валовой вместимостью 500 и более)

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

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

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

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