Marciano was hired as Chief Engineer on board the vessel MN Australia. His contract of employment was for nine months. After nine months, he was re-hired. He was hired a third time after another nine months. He now claims entitlement to the benefits of a regular employee based on his having performed tasks usually necessary and desirable to the employer's business for a continuous period of more than one year. Is Marciano's claim tenable? Explain your answer. (2017 BAR)