As a result fron testing and trying different things, the farthest away I could get it to show moving ships is 35km away. That might be directly written in the software unless I'm missing something. I've extended the ranges of the radars and sonars to 100km. It picks up most things but others don't show up unless you're closer. I'll upload that as a seperate mod.
http://subsim.com/radioroom/download...o=file&id=1705