"Jack Aubrey would find the term highly insulting - and I may not want to piss him off, even if he is just a ficticious hero!"
Although fictional, many of Aubrey's exploits were based on the real life adventures of Admiral Lord Thomas Cochrane, 10th Earl of Dundonald. Any Aubrey/Maturin fans would find one of the numerous biographies of this extraordinary character fascinating reading. A new one was published last year:- "Cochrane: the Life and Exploits of a Fighting Captain" by Robert Harvey.
A couple of descriptions of this series I particularly like: "Jane Austen for blokes", and "Cocaine for intellectuals". & one of mine, possibly the greatest series of historical novels ever written.