Convoys

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I have a couple questions

1. Are convoy numbers used (transporting goods between two provinces) based on distance and/or amount of goods transported

2. supply efficiency, if you have zero supply efficiency and you trade 10 oil for 10 metal, do you lose the 10 oil and not receive 10 metal or do you just not make the trade

 

[blue emu]

I have a couple questions

1. Are convoy numbers used (transporting goods between two provinces) based on distance and/or amount of goods transported

2. supply efficiency, if you have zero supply efficiency and you trade 10 oil for 10 metal, do you lose the 10 oil and not receive 10 metal or do you just not make the trade

1) Both. You need AT LEAST as many convoys as the length of the route (eg: at least 17 convoys for a 17 province route)... and if there is too much for those ships to carry, extra convoys are required.

2) You lose the Oil and get no Metal. Your trade partner loses his Metal and gets no Oil.

 

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http://www.paradoxian.org/hoi2wiki/index.php/General_Gameplay_FAQ
has answers to many geneal questions including more info about convoy math:

http://www.paradoxian.org/hoi2wiki/index.php/General_Gameplay_FAQ#How_do_Convoys_work.3F