Generally, there is no way how to tell which frequencies from discovery hits are interesting without listening to them.
However, here is my way how to clear things up a little.
After downloading discovery run to the Sentinel, I perform these actions:
- Delete all records with Avoid tag set to On (that means I pressed avoid button during discovery for whatever reason)
- Delete all records with Duration equal to 0 sec or 1 sec (that means no audio recorded or only a short burst)
- Delete all records with Duration equal to hits count (that means average recording time for each hit is less or equal to 1 sec - probably data bursts only)
- Quickly review all records with Duration equal to your Record duration setting (that means the record duration overflow was triggered, so it might be just a constant carrier or noise on the frequency - when this is the case delete them)
- Delete all records without CTCSS/DCS/NAC/CC (well this one is tricky, but my personal experience is that 99% of agencies do use some kind of subtone or signalling)
After this, you should have several frequencies remaining to listen to...
As for the transfer of the frequencies to new FL, I think the copy/paste works well in Sentinel. Or you can copy to excel, modify and copy back.