Mmm. Not sure about real life sources. Maybe a sailing handbook? The basics are going to be the same even if the ships have changed somewhat. History books galore, hell, even the interweb has been known to provide info. accurate enough for a game.
For ideas re stories and such I'd recommend:
The Master Mariner by Nicholas Monsarrat. The Master Mariner has been cursed to live forever after he chickens out while fighting the Spanish Armada. Unfortunately Monsarrat died while writing the second volume. But he was a sailor himself and had sailed around the world and lived on a yacht so I think his sailing details will be accurate.
The
Ramage Series by Dudley Pope are a good wheeze too. The eponymous hero leads his crew in a series of highly improbable Boys Own adventures during the Napoleonic Wars. Kind of a modern version of Horatio Hornblower.
Horatio Hornblower by C. S. Forester. Um, the eponymous hero leads his crew in a series of highly improbable Boys Own adventures during the Napoleonic Wars. Hey, I said Ramage was similar.
hope they help. And good luck with all that buckle swashing!