Great work. Scratch built or kits?
One could also take a look at Song of Drums and Shakos, also More Drums and Shakos. They cover the Napoleonic period; not about age of sail per se, but still the age of Nelson. MDS has some rules for cannon which could be adapted.
All of the Ganesha "Songs" books use the same basic mechanic. As was noted, turns are based on activations, and action costs.
It would be interesting to come up with an activation system for sailing a ship. Changing speed, navigating , dropping anchor, loading, reloading and firing, and so on, so the player would have to think about how to put his crew to use.