I have made a few changes to civilians.
1) If possible, their colony ships will select the closest destination that is not the destination of any other civilian ship. If not possible, they will behave as they do now.
2) I have added civilian freighters. These will pick up infrastructure from a civilian space centre and deliver it to any hostile environment colony where the current infrastructure is less than 2000 (enough for a 10m pop on a col cost 2 world). For now, they will only do this for colonies you have created, even those with no existing pop or infrastructure. They won't create new colonies, although I may add that in the future. Like the colony ships, they will try to select destinations that are not already the destination of the other infrastructure freighters. The infrastructure itself is provided by the civilian space centre and doesn't cost wealth or resources.
3) I have removed civ grav survey ships for the moment.
4) Finally, civilian ships no longer require fuel. It is assumed the civilian space centre will provide the necessary fuel and it makes things much easier with a minimal reduction in gameplay
Steve