Captain Horatio Hornblower 1951 - Gregory Peck (Votes: 18)
Damn the Defiant! 1962 - Alec Guiness (Votes: 2)
Billy Budd 1962 - Peter Ustinov (Votes: 1)
Horatio Hornblower TV Series 1998-2003 - Ioan Griffin (Votes: 31)
Master and Commander: The Far Side of the World 2003 - Russell Crowe (Votes: 77)
Here's another good one I picked up years ago, the price seems to have skyrocketed since but worth it if you find it cheaply.
I just approved a newly uploaded file of a ship mat that might be of interest to folks: http://sailsofglory.org/downloads.php?do=file&id=180