What version of the Underwater GPS software is on your kit? (If you are not on the latest version 2.3.2 I suggest you upgrade: https://update.waterlinked.com/#/ )
In order to get the positioning working as expected you need to:
– Verify that you have configured the correct Locator and channel (typically this will be channel 17)
– Verify that you have measured the distances to the receivers correctly and that they are correctly entered in the GUI
– If you are testing in a small pool you should limit the search-range to the size of the pool.
See the quick start documentation here: https://waterlinked.github.io/docs/explorer-kit/quickstart/
If you are using the latest version of the Underwater GPS software you will see warning messages in the top right corner if the receivers are not connected and other issues that are affecting the positioning algorithm. Using the Locator-U1 you will get a clear indication when the locator is not in the water however it is less clear with the Locator-S1. This is something we are planning to improve in a future release of the Underwater GPS. The time of the next release is however not clear at this point.