Gee I'm glad
@mikerezny covered this with that great post with the pic, while I'm on top of this weight stuff but with a few years of 22 wheels to worry about it still does my head in trying to explain and many worry to much about tare weights on plates, just ignore them they are an artificial base line which doesn't exist .......................when we needed to know exactly how much the vehicle could be loaded with, we had the truck set up with it's basics, tool box, spares, full fuel, driver and lunch box then put it on the scales, this would be the real world tare not the one on the compliance plate, weighed each axle this then showed us how much we could put on, even then we could blow it as while the mass was correct one set of axles could be over while another would be under so the stuff would be moved . This applies to tug/van coombo's as well, your tug tare on the plate is fantasy also.......
Aircraft would be easy, watched Loadies with the slide rule and weight of each bit of kit, then crack up when the late box turns up and they have to move everything....................hey you 6 blokes sit down the back here and don't move...