As I've noted here before, Master and Commander is a very fine movie. This piece by an MFA in Screenwriting & Film Theory does a nice job discussing the film's many merits. (A bit of text but the main discussion is in a 25-minute video.)
(The catchy piece of music by Luigi Boccherini played at the end of the film is here.)
The whole movie, free for now.
The late Roger Ebert's review (4 stars out of 4).
An hour long look at the making of the movie.