4th Officer (Четвертый помощник) / Motorman (Моторист) / Third Officer (Третий помощник)

Motorman, Wiper, Oiler, AB / Motorman

Motorman

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

Officer in charge of an engineering watch in a manned engine-room or as designated duty engineer in a periodically unmanned engine-room on ships powered by main propulsion machinery of 750 kW propulsion power or more, Motorman