Ahoj!
Even though the steelnavy site is already linked somewhere here, this article has an enormous collection of rivergunboats. Showing the use of deckspace :)
http://www.steelnavy.com/1250ChinaStation.htm
Borys
Very cool, thanks.
From the Axis Forum, some German colonial maps:
http://www.rudolf-hafeneder.de/40377.html