n. 货载管理员, 押运员

[经] 上等货, (商船的)商业事务负责人

[ noun ]
an officer on a merchant ship in charge of the cargo and its sale and purchase
<noun.person>

Supercargo \Su`per*car"go\, n. [Super- + cargo: cf. Sp.
sobrecargo. Cf. {Surcharge}.]
An officer or person in a merchant ship, whose duty is to
manage the sales, and superintend the commercial concerns, of
the voyage.