If a person knows without a doubt that a frequency is no longer in use [because the agency migrated to another frequency or trunked system], they can submit to the database an update for that particular section of the DB and suggest that we mark it as deprecated.
Frequencies only get removed if (a) somebody submits information stating that the agency(s) no longer have radios in their vehicle / on site to even use those frequencies and (b) we have significant faith that it is true.
We mark things deprecated based upon user reports. We only delete when there is some sort of proof that the agency [supposedly no longer using the frequency] has no ability to use the frequency.
Mechanisms to deal with this have been in the DB for years. This is how we've always handled it. And one must keep mind that just because nobody hears anything doesn't mean nothing is being said. We don't want to start getting submissions from people who have listened to a frequency once in the past six months, for five minutes -- did not hear anything -- and then submits to the DB that it has been vacated.
If a person absolutely knows that a frequency is no longer in use, or that an agency listed as a user of a frequency is no longer using that frequency, they can open a submission to that part of the database and we'll change the description to fit current usage or mark it as deprecated.d
Of course, anybody submitting anything suggestion that frequencies / trunked systems are no longer in use can expect to have to engage in back and forth dialog with us. We need to be confident before deprecating or removing anything.
Mike
