G'day John,
I was involved with the "Albert" Blog under Working Vessels, and while I was waiting for the kit to arrive, I cut up some scrap and built a little Dredge Tender.
The drawing I found on the web, and altered the scale to 1:16 which gave me a model of 20 inches x about 8 1/2 inches. It has a hull shape very much like a Springer.
I chose to build it as I felt it was a fairly simple shape, and on completion I'm very happy with how it looks and how it performs. The bonus is that it's a scale model, not a Springer!
There is an image on the Albert blog under Working Vessels, reply #116 December 02/15
Ian