I have fooled around with the River Tow Boat by Steven J. Titze (EMDsd90mac) to be used on various routes with nautical context. We have little choice for tugboat (the only one I have are with sail structures) - nothing in the 1930-1970 range when rail barge service was very active. With the river tug, we could easily extend its potential, thus here are a few ...
I also have created a CN, and 2 QcRail Maritime Transport schemes ...
I would have love to place Co. icons on the chimney stack but the actual boat mapping cannot accommodate my whims
QcRail