About Hugh Mulzac
Hugh Nathaniel Mulzac was an African-Caribbean member of the United States Merchant Marine. He earned a Master rating in 1918, which should have qualified him to command a ship, but racial discrimination prevented this from occurring until September 29, 1942. Within two years he had earned his shipping master's certificate, the first ever issued to an African American. With this, he became famous for being the first ever black captain, the first black man to obtain a ships masters license and the first black man ever to command a fully integrated vessel.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.