[Rapzid]

Here are some users that have a high chance of noticing visually and in aggregate would probably produce a lot of noise:

* Air and sea port operators and navigators

* Military personal running supply lines

* Military personal on foot in operations and training

* Space-X

* NASA

* River boats

* Fresh water fishermen

* Etc

Out of all the possible users who would notice a 300m deviation just based on visual reconciliation, I personally would not say it would be so rare that the USAF would not find out very quickly. Of course, this is ignoring the equipment that would likely detect the issue way before somebody in the Army started phoning the USAF.