There is an amazing build over on RCGroups of an U.S. Army Corps of Engineers snag boat used on rivers in the Pacific Northwest. 

http://www.rcgroups.com/forums/showthread.php?t=1497645

hey this is just the rudder setup I'm going to use on my boat
i just get shivers looking at details like this
very nicely done
greetings from The Bombus

Fantastic piece of work!!!

Picture 2 shows the rudder linkages going through cleats. In picture 3 these are updated to neat little brass pulleys. Must have made a massive improvement!!

Very nice roomy, tidy, clutter-free workshop too.......I'm jealous of just that!!!

A great looking model, and a nice scale too