Any reasonable fisher would. If you are adding weight or changing your vessel, it's going to make a stability difference. It's something inherently you would be aware of, whereas something like adding a railing might not be significant.
The staff are around in the ports all the time, and they certainly have conversations on a daily basis with fishers. As well, when they're having major work done, it's normally done at a facility. Part of what those facilities do, obviously, is advise.