SUPERCARGO
supercargo
(noun) an officer on a merchant ship in charge of the cargo and its sale and purchase
Source: WordNet® 3.1
Noun
supercargo (plural supercargos or supercargoes)
An officer on board a merchant ship who has charge of the cargo and its turnover (or the senior of two if one has two, the other being the subcargo; usually historical, since nowadays a person with such a job would remain on shore).
Source: Wiktionary
Su`per*car"go, n. Etym: [Super- + cargo: cf. Sp. sobrecargo. Cf.
Surcharge.]
Definition: An officer or person in a merchant ship, whose duty is to
manage the sales, and superintend the commercial concerns, of the
voyage.
Source: Webster’s Unabridged Dictionary 1913 Edition