In getting this photo, I confirmed that my rail barge really does float. The tug does not. And while the barge floats, it also drifts (especially without a good tug to hold it in place). And to top it all off, the tide keeps changing the water level, which may not matter if everything floats, but my solution to the drift was to set the models on rocks to keep them in place. Fortunately, the tide was going out - not coming in!
That is BNSF Bridge 4 (6.3) in the background.
