I played with some units in the shop. It looks like the NavPilot has a problem if the GP330B is used a GPS source because unlike the TZT2, it doesn't doesn't have a way to set a local time offset. (nor does the GP330B) We will report it to Japan. Had this been a GP33 source, it would work because the source GPS could have offset applied in the GP33. The TZT2 unit is the one you will want to refer to for correct ETA. It might be possible to have the pilot with the same numbers if you were to connect via 0183 to the pilot. The TZT2 could send the GPS with applied offset and it would most likely be a good work around. I will test that and let you know.