Navigation Lock Status
The "Nav Lock" overlay displays 1 - 4 bars indicating the ability to maintain the current 2D location accuracy in areas without GPS or infrastructure.
More bars can be obtained by walking around an area with GPS, infrastructure (BLE beacons, UWB anchors, etc.), or by a user check-in. If the "Nav Lock" overlay displays "3D", it indicates floor level accuracy will also be maintained.
In the example below, I turned on my Tracking Unit and then walked around the UWB anchors set up in the office. As I walked near the anchors, the Nav Lock Status improved. Once I reach four bars, I am fully initialized and continue to walk around the rest of the building, which has no additional infrastructure.