This discussion is getting a little monotonous. A fixed station is one of a pair that exchange information between those points only. As a Part 90.20 coordinator we licensed many fixed stations which are primarily used to report such things as water levels on a flood gauge or storage tank, control sprinklers on a golf course and the like. Both points had to be identified on the frequency authorization and commonly were low-power, typically 5 watts or less. The only "fixed stations" carrying multiple types of information are microwave.
On the Federal/DOD side, we see things a little differently. They are not always stationary points.