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• n  an officer on a merchant ship in charge of the cargo and its sale and purchase

• Instead of proverbial rollicking freedom, rhythmic sea-chanteys, rough cammeraderie of the sea, Blettsworthy, supercargo, found ship's quarters confining, and ship's officers .
• Because he was no longer a union man, to porters, pitchers, ticket collectors, out-goods and cartage men everywhere he traveled he was a sort of hot supercargo, a one-man .
• Her supercargo sold his alcoholic wars on rum row and decamped with the proceeds.