Calkers were skilled workmen who stopped or strengthened the seams and openings of ships. They sealed the joints in the decks or sides of vessels to make them secure.
The inhabitants of Gebal are described as performing this work on the vessels of Tyre. The term may also be rendered “strengtheners” or “stoppers of chinks.”
Calkers were associated with shipbuilding and the maintenance of seagoing vessels. Their work involved repairing or sealing the structural openings of ships.