Pirates of the Open Seas

From publisher blurb:

This book provides all the details needed to fully explore the open seas of the world, from Madagascar in the Indian Ocean to the far north of Europe. Listings of towns and cities provide targets and havens for pirate crews and advanced rules for Character creation according to different regions of the world draw one further into vast seas at the edges of the maps, where adventure awaits in realms where only stories and ships can lead.