After comeing across this:
http://www.subsim.com/radioroom/showthread.php?t=169590, I got to thinking. Is there any possible way to mod different engine sounds for different boats? If you read the article I posted you would see just how many different types of engines were used in the different classes of boats. It would be cool to have a different sound for a H.O.R engine as opposed to a Fairbanks Morse.