Meshtastic

Create a comms Channel named UCARS and add the following encryption key (replacing whatever else is there).

eR9+2szwqn0hR+FvWYPx5VdKmL1stkQzGIqX7eGhKF0=

Now you should get all messages sent in that channel with that key.

Theoretical propagation estimated by Meshtastic Site Planner https://site.meshtastic.org/

https://ncmesh.net/ does a net at 8pm on Wednesday and Saturday on LongFast.

I think some people make sure their node is operational around that time.