Attached is the Pro X (ATAK) User Guide
Automatic Location Sharing:
Update your location based on a time interval (Frequency) or movement (Distance). The 'Frequency' selection now comes with a jittering % option. Make your automatic location updates less predictable by changing your location transmission intervals by a selected percentage.
Generate multiple encryption keys to prevent certain users from reading your broadcasts. You can now prevent spoofing on your end user device by toggling 'Ignore Unencrypted Messages.'