Also... make sure you pick the right time period. If you're talking 15th century, you'll have different vocabulary to 19th century due to the different sailing technology. Equally, different cultures had different approaches.
I'd echo what
@The Ace says - at least as far as the Hornblower and Alexander Kent books (didn't read Alexander Cordell). I read those when I was a kid (and after!), and loved them. In a similar vein, though slightly lighter (but historically accurate as regards the sailing bits, at least), there's Dudley Pope's
Ramage books - and for those who want galleons, Pope also did a short series set in the 17th century West Indies -
Buccaneer, Admiral, Galleon and Corsair. He did
Decoy and Convoy set in WWII as well. As I recall, the
Ramage books were pretty good for naval tactics, and details like moving the ballast around to improve the trim of the ship.
To be fair, reading good sailing novels is probably an excellent way to pick up ways of making your sailors come to life, in a way that reading textbooks wouldn't. Additionally, you can use the novels as jumping-off points to show you what you need to read up on. Plus, you'll enjoy it...