Well, I'm trying to upload now but have had no success. I can fly all over Subsim but when I try to up............NEVER MIND!
So here you go, and this is more than you asked for, Neal. You know I've been on a kick for Universal Plug-in Mods, which are certified to make no changes to any game configuration but the ones the mod announces. This one joins the family, as it not only works with TMO, but every crazy configuration possible, making absolutely no gameplay changes, UI changes, HUD changes, music changes, or any of the other changes modders are so fond of changing.
So
Real 5-25 Deck Gun Sound.
In the mod, along with the readme file, is a video of a real 5-25 deck gun being demonstrated aboard a real fleet boat, probably during the war. It's a very interesting video and it might have changed some opinions during Beery's RFB deck gun controversy.
SH4 turns out to use only one sound for the deck gun regardless of the size you have mounted.