Advance
Local Merchant Preference
Theoretically a merchant can be a citizen of the world, sailing to and from whichever port he pleases. We are going to give advantages to home merchants, for example, priority for loading and unloading of cargo, to ensure that our merchants have every incentive to bring their products home.
OmanCountrypotentialAdvance tree
The game files don’t say where this goes: it has no requires, so the game places it in the 
Renaissance tree itself.
