So I got a Naval Artillery Observer assembled last evening. This is 2nd Lt. Moden of the 4th Battalion of the Cymric Sub-Sector Battle Fleet 4th Naval Infantry Regiment. He's an Imp Guard command squad adviser model with a Scion comm pack added.
I still need to look into Basilisks and Manticores to properly outfit the heavy fire support part of the Regiment, but it's starting to take shape as a playable force. Hopefully sometime this summer I'll get a game in with them. That's all for now and as always, feel free to leave in input or suggestions in the comments.