Why the sailors on the sailor we're more efficient than slave on merchant ships?

Sailors on merchant ships were often more efficient than slaves due to their training, experience, and motivation. Sailors typically had skills in navigation, sailing techniques, and teamwork, which enhanced their ability to operate the ship effectively. In contrast, enslaved individuals were often untrained and lacked the incentive to perform well, as they had no stake in the ship's success. This difference in motivation and skill set contributed to the overall efficiency of crews composed of sailors.