O'Brian's The Truelove is a well-crafted story of intrigue, a screwed-up relationship, some healthy ones and lots of sailing.
I use the word "crafted" intentionally; the book feels a bit less organic than some of his others. Perhaps "architected" would be a better word. The reader is led along and there's little chance of the story getting away from the author. "Scripted"? Would that be better?
Still, it is a very fun book to read and it is easy to get caught up in the action.
I'm going to play around with Google Maps and see if I can get some of Jack's Journeys to be mapped out.