cheng(Chief Engineer, commonly referred to as "The chief", "cheng", or just "chief", is responsible for all operations and maintenance that have to do with all engineering equipment throughout the ship wikipedia.orgFreelancer-TKM)
chief engineer(In marine transportation, the chief engineer is a licensed mariner in charge of the engineering department on a merchant vessel. "Chief engineer" is the official title of someone qualified to oversee the entire engine department; the qualification is colloquially called a "chief's ticket". wiki Alexander Demidov)
