Alought without exactly dated,Banished Studios has an announcement saying that beta test for Navisaer will coming soon.Below is what they said:

welcome. We here at banished studios have been working hard for the past year with navisaer, and would like to thank the community for your support.

no dates have been set in stone, but we would like to mention that our beta/alpha testing will begin very soon. we are hoping within the next month, before christmas, to bring you a sneak peak. stay tuned, we will have an exclusive beta center with screenshots/content not shown to the public. if you would like to participate, respectively email rdye@banishedstudios.com.