Alert
Overview
Reference material for the Alert tool/feature in ATAK, sourced from the official ATAK 5.7 Software User Manual (chapter 26, "Alert").
Manual Reference
Select the Alert icon to open the Alert Tool in ATAK. The Alert Tool provides the capability of indicating the need for assistance, the type of emergency and its location on the map.

The type of emergency can be selected from the drop-down menu, before activation, and includes options for a 911 Alert, Ring the Bell, Geo Fence Breached or In Contact.
Once the emergency type has been selected and both switches have been enabled, the TAK Server broadcasts the announcement to all network contacts. Even if the device is turned off, the beacon will continue to broadcast. The beacon can be canceled and removed from the map by returning to the Alert tool and toggling the switches off.

Source
ATAK 5.7 Software User Manual, 13 March 2026 (Unclassified), pages 83–83.