a an ex ( nuclear ) submarine officer i must admit this be my favorite submarine movie ( even exceed hunt for red october ) . someone know something about submarine when they write the movie . ok not realistic but it be a comedy and have all of the inside joke from the submarine force . a great cast with the stereotypical uptight submarine guy on the orlando and our hero on the diesel boat . definitely dbf by the way equal that mean diesel boat forever . but they want ten line in order to post this jees be the admiral in charge here . line 10 .