'Calkers' in the Bible

The old men of Gebal and the wise men thereof were in thee thy calkers: all the ships of the sea with their mariners were in thee to deal in thy merchandise.

Thy riches, and thy wares, thy merchandise, thy mariners, and thy pilots, thy calkers, and the dealers in thy merchandise, and all thy men of war, that are in thee, with all thy company which is in the midst of thee, shall fall into the heart of the seas in the day of thy ruin.