Widdershins
Warlord
- Joined
- Dec 1, 2022
- Messages
- 103
For traders to enter water you also need to research Celestial Navigation.
Never mind I see you are playing as Portugal, so you get it from the start. It could be possible there isn't a way to reach it through just coastal water. If that's the case you have to beeline Cartography to enter deep ocean tiles.
My guess is Alexandria was too far from Lisbon to trade with (i.e. more than 45 tiles...I guess), even though it could be reached by hugging the coast. When I made a city more to the south I could then trade with Alexandria. I'm definitely paying more attention to these things!