Great to hear that you are having success with the Underwater GPS!

Are you using the 1.4 release?
If so, we expect the input depth and output depth to differ.
From the 1.4 release we will use the depth from the ROV as input and then adjust it based on acoustic triangulation.
This typically improves the depth measurement, however in a very noisy environment the depth might fluctuate a bit.

Best regards,
Water Linked