The Altera Centauri collection has been brought up to date by Darsnan. It comprises every decent scenario he's been able to find anywhere on the web, going back over 20 years.
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Call To Power 2 Cradle 3+ mod in progress: https://apolyton.net/forum/other-games/call-to-power-2/ctp2-creation/9437883-making-cradle-3-fully-compatible-with-the-apolyton-edition
It's gotta be in one of your cities with a barracks, I think.
“I give you a new commandment, that you love one another. Just as I have loved you, you also should love one another. By this everyone will know that you are my disciples, if you have love for one another.”
- John 13:34-35 (NRSV)
I've only been able to heal my ships inside a city (harbor and/or barracks not required). Might be able to heal them within your culture border but I've never tried.
I just assumed because you can do it IRL, and you can do it in Civ2, you could do it here, but I tried it with galleys and caravels before deciding "you can only heal naval units in cities."
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