system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why doesn't Russia have a warm water port on it's Black Sea coastline?

Like the question states, why don't they have one on their own coastline? It seems like it would be easy to create their own warm water port so that they wouldn't have to worry as much if their lease at Sevastopol would be revoked.  I realize that the port issue is a smaller part of a bigger problem, my question is more in regards to Russia's timeline as a whole on the black sea, why haven't they ever built a warm water port on their coast?
gpt
> It seems like it would be easy to create their own warm water port

Possible?  Yes.  Easy?  No.  Naval bases are complicated, huge, and expensive.  Russia *is* actually making another one, at Novorossiysk (on the Russian Black Sea coast, halfway between Sevastopol and Sochi).  But that was started when it looked like they might not have Sevastopol forever.  Before then, why would they?  Sevastopol was theirs for centuries.  They wouldn't really need to.

So the short answer is that they are making another one.  But it's not finished yet.