Beacon Industrial-TX-25 to Beacons Industrial-RX ranging is accurate;
Beacons Industrial-RX to Beacon Industrial-TX-25 ranging is inaccurate;
Beacons Industrial-RX to Beacons Industrial-RX ranging is inaccurate;
Right. Because Industrial-RX doesn't emit ultrasound. They can't get the distance towards another Industrial-RX or towards Industrial-TX. It must be Industrial Super-Beacon or Industrial-TX on the other end and they must emit. Then, Industrial-RX can measure the distance - not vice versa.
The same you shall expect with Industrial-TX to Industrial-TX, for example. They can transmit ultrasound, but they can't receive.
For these cases, you shall enter either distances or coordinates manually.
Industrial Super-Beacons offer the easiest way - they self-measure the distances automatically.