Not able to build warships

[Jedic]

The city is on the coast of a 14 tiles inland lake. All the tiles are coast tiles. The city have already build a workboat, lighthouse, harbor and the Colossus, but it can not build tiremes and galleys, while other cities next to the "real" ocean can.

Screenshots and savegame can be found in this thread.

 

[ori]

I replied in that thread, but still:
the game requires a lake of at least 20 tiles for war ships and 10 tiles for lighthouse and harbor

 

[Jedic]

Yep, just tested it myself and it's not a bug. Just a strange feature.