Voyage! is a stand-alone campaign system for games set in the Caribbean during the mid-late 16th century. It is intended for use with the The Perfect Captain’s Spanish Fury game.
Rules: Naval
The Great War Naval Rules
The Great War Naval Rules is a very comprehensive set of rules for WWI Naval warfare.
American Civil War Riverine Actions
American Civil War Riverine Actions is a set of free wargames rules for ironclads, tin-clads, cotton-clads and all the fun and unique ships that plied the rivers of the United States during the ACW.
Death On The Seas Ancient Naval Rules
Death on the Seas is a set of free wargames rules for ancient naval warfare. Also, Death On The Seas ship appendix.
Bombs Away Carrier Game
Bombs Away is a simple, three page print-and-play game about carriers in the Pacific.