Every now and again we see a realistic civilian minifig-scale LEGO boat, and they keep getting better. The latest is this steam-powered tugboat by Koffiemoc. It is actually a recreation of the last steam tug in Germany, the Saturn. The builder was inspired by this photo and I think he has captured it almost perfectly.
I love the shaping and colour blocking on the hull, but my favourite parts are all the realistic details on the deck. Notice the different minifig headgear used as lights and how the tile on top of the smoke stack is pressed in only halfway to give it a gentle slope. The realistic look is especially facilitated by use of tyre pieces on the side of the boat.