Jack creates his own pirate flag
In piracy, it was common for a flag to consist of a skull above two long bones. In the Pirates of the Caribbean series, the best-known flag that belonged to Hector Barbossa had the same design. Jack used a skull-over-crossed-bones flag but also personalized it with a red sparrow. So, when Barbossa and his crew deserved Jack at the end of the third movie, he had the ferry for himself across the seas but did so in style.