You will never find any documentation on that either. Since that is something that are not posted on the web. But Kongsberg mentioned it during a TV-program here in Norway where they are talking about future technology, in that TV-program most of the time they was talking about new tech. from USA, but the NSM was just mentioned in a short video on that show. You see here in Norway we don't do that extreme propaganda like in USA or Russia, her in Norway if there is something to mention, it just get mentioned in a short video and that's it.
Spokesman from Kongsberg say NSM have Jamming equipment. But I can also say that what type of jamming equipment and how it works on the NSM is top-secret. Kongsberg said it that they can revile some of the most obvious tech on them, but they are not allowed to specifies what type of Jamming equipment.
For the silhouette talk. well NSM computer have complete silhouette of any ship. so when it fly along it notice and map out where all commercial ship are but also where military ships are. The NSM doesn't need any confirmation like harpoon or penguin, in fact NSM take that fire and forget, to an different level. The NSM have the ability and have shown it on several test that it just fly by any non-target and attack one of the assigned targets in that area, in some test it was even send in to an area without any target assigned, but it still managed to find the most important target, and hit it where it hurt most for the ship.
to compare NSM with penguin and Harpoon, is like comparing Lada to a Bugatti...
I know it sounds magic, but it also just happens that Kongsberg opened the future tech. box, and made it work. blowing some limitations that we ""amateurs"" didn't know about. And I bet that since Kongsberg made the Yard stick, USA and LRAM have to make it even better... perhaps the explain why it goes so slow with making that LRAM, and US are testing the NSM for finding out new things to do for improving the technology. The NSM and the LRAM was/are designed to defeat any radars on today's marked, of course they are not perfect. for example when the Norwegian frigate fired the first NSM, the AEGIS radar didn't manage to detect the missile, they had to use an tracker on it, just to manage to see the missile.
But perhaps everything is an propaganda like that, Russian radars are so good, and Russia have world best AAW system, or no-one can defeat a aircraft carrier fleet (tell that to an Ula class submarine, it have done it twice now!), or the Brahmos is so fast no-one can shoot it down. then what about the almost self-thinking system on the NSM or LRAM... joke that to. oh wait what if it all is top secret.
Found this one, doesn't mention jamming, but that is a hush hush thing, you can mention it but not explain it.... But in the text it tells about that you can tell the NSM to target a specific vessel or don't attack these couple of ships or just send it in to an area without no target, the missile will find target by it self and...
apparently in the text they say that JSM can fit in to a Mk-41 VLS... that's interesting.
http://www.defensenews.com/article/2014 ... ms-Pacific