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 on watch (OOW) (Вахтенный помощник капитана) / Seamen (Матрос)

Cargo Operator, Officer in charge of a navigational watch on ships of less than 500 gross tonnage, engaged on near-coastal voyages, Officer on watch (OOW)

OS, Seamen

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, Officer on watch (OOW), Third Officer