well its propaply mean that they have refurbinished one of their old SSKs or midget submarines to service again, Sorry but i doupt severly that there isent any new desings

But for pictures of Serbian navy, register into http://www.Defencetalk.com and to its forums. It should be as easy as to come here as they share the bulleting board layout

and then find yourself in to the http://www.defencetalk.com/pictures/showgallery.php/cat/4312
Theres about sixty of so pics of Yugoslavian navy, the best collection that web has in english 😀 😀

And i think I know bit something about the serbian/yugoslavian naval matters so if you are keen to share Im always willing full to help.