Hello and5566 thank you for getting back to us and thank you for those images.
As you have had come trouble creating a support case, I have went ahead and made one for you. Please try to access your new case by visiting this link > https://www.ubisoft.com/en-us/help/cases
Your case number is 15418278. If you can upload your save file to that case, that would be fab. I believe the limitation is 5mb, so you may or may not need to zip the file. Once you have uploaded it, please let me know back in the forum and I will pass this on to our Anno QA team.
In the meantime, please try the following steps to see if this will fix the hoovering airship issue >
- Verify game files > ...