From the introduction:
This detailed list of pirate era style sailing ships provides a wealth of information for the GM needing to quickly fill up that harbor full of vessels waiting to be challenged, exploited, or cautiously avoided. Included in the notes are the following details: ship name and type (galleon, dogger, sloop, barque, etc.), the captain’s name and official title (as in captain, major, commodore, admiral, etc.), and a brief detailing of important cargo and passengers. In addition, the GM may find other treats listed in the cargo notes, including the occasional treasure map, stolen jewels of the crown, etc.