Charts.

[longdog499]

I just came across a site that was new to me,it's called RealSimulation.com.They have just started a new SH111 section and in it they have a download for sea charts.After you unzip them they open as JPEG Images with Paint so you can mark your routes,sinkings etc.and keep them as a record of each individual patrol.

[Steaminboot]

Found the site Longdog, but no sign of Siii, you got a direct link ?

[longdog499]

Try......http://u-boot.realsimulation.com/
That's the address added to 'my favourites' on my computer.It's a good site.Seems to be growing daily.