Here is the thread for it -
http://www.subsim.com/radioroom/show...ghlight=sh3gen
Basically you sail 200km out of port and save game, Alt tab out of SH3.
Start SH3Gen and locate your profile and saved file, start the generation.
Load saved game.
And hey presto your map has suspected/last known locations of both single vessels, task forces and convoys, and your captain's orders/briefing includes what vessels are suspected of being where, i.e. Loch Ewe - HMS Viperous, HMS Compass Rose (courtesy of The Cruel Sea, Nicholas Monserrat, that I'm currently reading
)
You can alter the accuracy of intelligence, and some other things I can't remember off the top of my head.
The only problem I've come across is that occassionally it'll put some convoys/vessels inland
but lets just call that a very dry dock.
I haven't played with the GIS mapping yet but sounds like it should be good.