[Scan-DC] references to "Often Encrypted"

[Greg Danes]

Browsing the RR database today under Washington-Baltimore Metro, I see a
lot of federal listings as P25E for encrypted but they are listed as "often
encrypted". Does that mean they are sometimes clear but digital? Just
wondering when and why they would be. Going a bit further, if the federal
agencies wanted really secure comms they could use Spread Spectrum or
frequency hopping and encryption although that might be overkill.

KJ4DGE