I adore this film, and you've described it beautifully. A bit of trivia that might amuse you as it does me: the shot of the ship at the end was taken from The Bounty (1984), the one with Anthony Hopkins as Bligh, and duly credited. Which is understandable in that the era fits and they didn't have to spend money on building something that would be used so very briefly, but it does cast an ominous shadow on Captain Wentworth's future career....