What is the author's style in The Wine-dark Sea by Patrick O'Brian?

The novel is told from the third-person, limited, point of view. The narrator is reliable, entirely effaced, and unnamed. Jack Aubrey and Stephen Maturin, the main characters, are the protagonists and central figures in all of the scenes in the novel. The narrator divulges some internal thoughts of the protagonists, but not of other characters. The majority of the story is told through action and dialogue. Revealed thoughts are infrequent and are used for characterization rather than plot development. Occasional personal letters allow for some first-person introspection without destroying the cadence of the overall narrative structure; in the novel, these letters are from Maturin to his wife Diana. On one occasion, narrative events are recapitulated by Sam Panda for Aubrey's benefit.