Deck gun MOD question

[gar]

I have seen several posts reflecting the use of "New Uboat Guns 1.2" by Captains I respect. My question is what does it do? and where do you find it? I have started an early career, 1940 in a TypeVIIC. I have been using my deck gun on small ships, boats and to finish off some of the larger ones. Does this MOD replace the appearance or change the performance of the deck gun? Thanks in advance. I would also like to thank everyone in the SH3 community. The time and effert you guys put in to help and inprove the game through advice or MODS for all to enjoy shows what a great bunch of people you are. I found SH2 & 3 as a set on a discount rack in a business store (having played AOD and a couple of other subsims years ago I picked it up not relizing what a ride I was in for). I found GWZ and subsim.com in a routine web search and now my wife can't get me off the computer. as the saying goes "The rest is history" Thanks again - Garry