Uploaded, JGSME ready. Only a single sound file so shouldn't have any conflict with other mods, although I don't use 1.5 so I don't know if the U-boat deck guns use the same sound or not. If not, permission granted for whoever wants to replace Das Boot's cannon sound with this and upload. Usual copyright, bend fold staple and mutilate, it's freeware who cares.
DISCLAIMER: This mod is unlikely to get your dog pregnant, but you never know.
EDIT: Forgot the link;
http://www.subsim.com/radioroom/down...o=file&id=5454