Hello, Regarding the AIS feature, I released an update yesterday. I can see that you are currently using version 2.0.3. Please join the testing programme through Google Play and then update the app to version 2.0.4. I believe the AIS functionality should work better in this version. However, please note that, as I mentioned previously, I do not have an AIS device available for testing. The current AIS feature was developed based only on the technical documentation and has not yet been properly tested on a real boat. Therefore, it is normal that there may still be some bugs. I would really appreciate your feedback and assistance with testing. Regarding the nautical charts, I have already explained this in your previous post. Licensing detailed worldwide nautical chart data would cost more than NZD 500,000 per year. This cost would immediately make the app financially unsustainable. The app currently has no paid features, and I have already personally invested more than NZD 40,000 into this project. Since the donation option was introduced, the project has not received any donations. Therefore, I currently have no plans to integrate expensive, highly detailed commercial nautical charts such as Navionics. Thank you for your understanding.