Merchant "out of range" from city trying to start a trade route with.

That doesn’t make any sense to me if so, but it would explain some things.
It's my understanding a sea route can only be created with a ship, such as the dhow. I don't believe a merchant can create a sea route. Please, correct me if I'm wrong.
 
Please, correct me if I'm wrong.

It doesn't matter how your merchant (or dhow, I guess) gets to the target city.

The actual route will always be from your closest city in range (relative to the target) to the target. The game determines that by itself.

If this is a route over water, that's what it is (but you need a coastal connection for that). And maybe they made it so that the dhow can only create sea routes? (Haven't played with it yet.)
 
It doesn't matter how your merchant (or dhow, I guess) gets to the target city.

The actual route will always be from your closest city in range (relative to the target) to the target. The game determines that by itself.

If this is a route over water, that's what it is (but you need a coastal connection for that). But maybe they made it so that the dhow can only create sea routes? (Haven't played with it yet.)
When you say “from your closest city in range” I’m assuming it doesn’t matter which town or city the merchant was sent from, the game just selects the closest one to trade with once you click on them. Am I understanding that correctly?

How do maximum distances come into the equation if this is the case, as it seems like some rotes will traverse over both land and water.
 
Am I understanding that correctly?
Yes. And the possible routes shown on the trade lense (like below) are independent from the position of the merchant. Don't build them in the capital (assuming it's somewhat central), the walk to your border city is a complete waste of time.

How do maximum distances come into the equation if this is the case, as it seems like some rotes will traverse over both land and water.
It only looks like that when there are fishing quays involved - then the route goes from there to the city it belongs to (even when it's inland). But the city has to own the quay.

This can lead to weirdness - this route doesn't go in a straight line to Tuban, but through the quay on the far side.

Screenshot 2025-03-06 011213.png
 
Is that the same line they will actually take when you initiate a route, or is it just the route they chose to get there prior to the route being created?
Do you have more detail on maximum route distances, as a previous comment showed different distances for land and water routes?
Im assuming now that the AI will pick either a water or land route depending on which is the closest and if both locations have a fishing quay etc, which then determines the maximum distance. Is that correct?
 
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The game shows you the route the merchant would open at this moment - it recomputes when you get to the target and trigger the actual route, of course (if circumstances change - like if you suddenly build a coastal town on that peninsula closer to Tuban for instance - the route will go there).

Important to remember: When you don't have complete line of sight, the potential routes can change as your merchant or another unit moves through the fog. But I don't know all edge cases for that.

I would guess the game just checks if whatever route it comes up with is "in bounds" - if not, it tells you the city is "out of range". Not sure it's more complicated than that.
 
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