Before revision: His position corresponds to that of the boatswain in the deck department, the pump man in an oil tanker, and the electrician (but not ETO) in the engine department of a container ship or general cargo ship.
After revision: The position corresponds to that of the boatswain in the deck department, the pump man in an oil tanker, and the electrician (but not ETO) in the engine department of a container ship or general cargo ship.